15551551050 has 96 divisors (see below), whose sum is σ = 44205599232. Its totient is φ = 3544313280.

The previous prime is 15551551013. The next prime is 15551551051. The reversal of 15551551050 is 5015515551.

It is a super-2 number, since 2×15551551050² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15551551051) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 343009 + ... + 385691.

It is an arithmetic number, because the mean of its divisors is an integer number (460474992).

Almost surely, 2^15551551050 is an apocalyptic number.

15551551050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 15551551050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22102799616).

15551551050 is an abundant number, since it is smaller than the sum of its proper divisors (28654048182).

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

15551551050 is a wasteful number, since it uses less digits than its factorization.

15551551050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43052 (or 43047 counting only the distinct ones).

The product of its (nonzero) digits is 15625, while the sum is 33.

The spelling of 15551551050 in words is "fifteen billion, five hundred fifty-one million, five hundred fifty-one thousand, fifty".