15725001894 has 48 divisors (see below), whose sum is σ = 36595641600. Its totient is φ = 4491513936.

The previous prime is 15725001889. The next prime is 15725001913. The reversal of 15725001894 is 49810052751.

15725001894 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

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 23 ways as a sum of consecutive naturals, for example, 1393527 + ... + 1404765.

It is an arithmetic number, because the mean of its divisors is an integer number (762409200).

Almost surely, 2^15725001894 is an apocalyptic number.

15725001894 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

15725001894 is an abundant number, since it is smaller than the sum of its proper divisors (20870639706).

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

15725001894 is a wasteful number, since it uses less digits than its factorization.

15725001894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16017 (or 16010 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 42.

The spelling of 15725001894 in words is "fifteen billion, seven hundred twenty-five million, one thousand, eight hundred ninety-four".