15551342400 has 336 divisors, whose sum is σ = 55896833088. Its totient is φ = 3753984000.

The previous prime is 15551342377. The next prime is 15551342441. The reversal of 15551342400 is 424315551.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16525930 + ... + 16526870.

Almost surely, 2^15551342400 is an apocalyptic number.

15551342400 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 15551342400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27948416544).

15551342400 is an abundant number, since it is smaller than the sum of its proper divisors (40345490688).

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

15551342400 is a wasteful number, since it uses less digits than its factorization.

15551342400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1290 (or 1275 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 15551342400 its reverse (424315551), we get a palindrome (15975657951).

The spelling of 15551342400 in words is "fifteen billion, five hundred fifty-one million, three hundred forty-two thousand, four hundred".