15625451400 has 192 divisors, whose sum is σ = 55233964800. Its totient is φ = 3619983360.

The previous prime is 15625451371. The next prime is 15625451453. The reversal of 15625451400 is 415452651.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 73681 + ... + 191519.

It is an arithmetic number, because the mean of its divisors is an integer number (287676900).

Almost surely, 2^15625451400 is an apocalyptic number.

15625451400 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 15625451400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27616982400).

15625451400 is an abundant number, since it is smaller than the sum of its proper divisors (39608513400).

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

15625451400 is a wasteful number, since it uses less digits than its factorization.

15625451400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117888 (or 117879 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

The spelling of 15625451400 in words is "fifteen billion, six hundred twenty-five million, four hundred fifty-one thousand, four hundred".