15851313604 has 135 divisors (see below), whose sum is σ = 35836674573. Its totient is φ = 6115815552.

The previous prime is 15851313571. The next prime is 15851313613. The reversal of 15851313604 is 40631315851.

The square root of 15851313604 is 125902.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 12340988100 + 3510325504 = 111090^2 + 59248^2 .

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 44 ways as a sum of consecutive naturals, for example, 689187537 + ... + 689187559.

Almost surely, 2^15851313604 is an apocalyptic number.

15851313604 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

15851313604 is the 125902-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15851313604

15851313604 is an abundant number, since it is smaller than the sum of its proper divisors (19985360969).

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

15851313604 is an frugal number, since it uses more digits than its factorization.

15851313604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 15851313604 in words is "fifteen billion, eight hundred fifty-one million, three hundred thirteen thousand, six hundred four".