15551413320 has 32 divisors (see below), whose sum is σ = 46654240320. Its totient is φ = 4147043520.

The previous prime is 15551413253. The next prime is 15551413321. The reversal of 15551413320 is 2331415551.

It is a super-3 number, since 3×15551413320³ (a number of 32 digits) contains 333 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (15551413321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64797436 + ... + 64797675.

It is an arithmetic number, because the mean of its divisors is an integer number (1457945010).

Almost surely, 2^15551413320 is an apocalyptic number.

15551413320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15551413320 is an abundant number, since it is smaller than the sum of its proper divisors (31102827000).

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

15551413320 is a wasteful number, since it uses less digits than its factorization.

15551413320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129595125 (or 129595121 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 15551413320 its reverse (2331415551), we get a palindrome (17882828871).

The spelling of 15551413320 in words is "fifteen billion, five hundred fifty-one million, four hundred thirteen thousand, three hundred twenty".