15951277056 has 264 divisors, whose sum is σ = 50342476912. Its totient is φ = 4460544000.

The previous prime is 15951277051. The next prime is 15951277091. The reversal of 15951277056 is 65077215951.

It is a tau number, because it is divible by the number of its divisors (264).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 15951276996 and 15951277014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15951277051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4830606 + ... + 4833906.

Almost surely, 2^15951277056 is an apocalyptic number.

15951277056 is a gapful number since it is divisible by the number (16) 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 15951277056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25171238456).

15951277056 is an abundant number, since it is smaller than the sum of its proper divisors (34391199856).

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

15951277056 is a wasteful number, since it uses less digits than its factorization.

15951277056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3359 (or 3330 counting only the distinct ones).

The product of its (nonzero) digits is 661500, while the sum is 48.

It can be divided in two parts, 159 and 51277056, that added together give a palindrome (51277215).

The spelling of 15951277056 in words is "fifteen billion, nine hundred fifty-one million, two hundred seventy-seven thousand, fifty-six".