15961513298400 has 576 divisors, whose sum is σ = 59235830539200. Its totient is φ = 4145541120000.

The previous prime is 15961513298399. The next prime is 15961513298429. The reversal of 15961513298400 is 489231516951.

15961513298400 is a `hidden beast` number, since 1 + 5 + 9 + 6 + 15 + 132 + 98 + 400 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 532230606 + ... + 532260594.

It is an arithmetic number, because the mean of its divisors is an integer number (102839983575).

Almost surely, 2^{15961513298400} is an apocalyptic number.

15961513298400 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 15961513298400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29617915269600).

15961513298400 is an abundant number, since it is smaller than the sum of its proper divisors (43274317240800).

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

15961513298400 is a wasteful number, since it uses less digits than its factorization.

15961513298400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30660 (or 30641 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 54.

The spelling of 15961513298400 in words is "fifteen trillion, nine hundred sixty-one billion, five hundred thirteen million, two hundred ninety-eight thousand, four hundred".