15551094240 has 432 divisors, whose sum is σ = 58820580000. Its totient is φ = 3738408960.

The previous prime is 15551094197. The next prime is 15551094283. The reversal of 15551094240 is 4249015551.

15551094240 is a `hidden beast` number, since 1 + 55 + 510 + 94 + 2 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (15551094197) and next prime (15551094283).

It is a super-2 number, since 2×15551094240² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 15551094195 and 15551094204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 25961461 + ... + 25962059.

It is an arithmetic number, because the mean of its divisors is an integer number (136158750).

Almost surely, 2^15551094240 is an apocalyptic number.

15551094240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15551094240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29410290000).

15551094240 is an abundant number, since it is smaller than the sum of its proper divisors (43269485760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15551094240 is a wasteful number, since it uses less digits than its factorization.

15551094240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791 (or 769 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The spelling of 15551094240 in words is "fifteen billion, five hundred fifty-one million, ninety-four thousand, two hundred forty".