615631775328 has 168 divisors, whose sum is σ = 1823930581536. Its totient is φ = 204451257600.

The previous prime is 615631775323. The next prime is 615631775377. The reversal of 615631775328 is 823577136516.

615631775328 is a `hidden beast` number, since 6 + 1 + 5 + 6 + 31 + 77 + 532 + 8 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (615631775323) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 6273198 + ... + 6370578.

It is an arithmetic number, because the mean of its divisors is an integer number (10856729652).

Almost surely, 2^615631775328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 615631775328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (911965290768).

615631775328 is an abundant number, since it is smaller than the sum of its proper divisors (1208298806208).

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

615631775328 is an equidigital number, since it uses as much as digits as its factorization.

615631775328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97680 (or 97657 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 54.

The spelling of 615631775328 in words is "six hundred fifteen billion, six hundred thirty-one million, seven hundred seventy-five thousand, three hundred twenty-eight".