7157536644 has 24 divisors (see below), whose sum is σ = 16702717248. Its totient is φ = 2385588640.

The previous prime is 7157536643. The next prime is 7157536651. The reversal of 7157536644 is 4466357517.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 7157536593 and 7157536602.

It is not an unprimeable number, because it can be changed into a prime (7157536643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108649 + ... + 161615.

It is an arithmetic number, because the mean of its divisors is an integer number (695946552).

Almost surely, 2^7157536644 is an apocalyptic number.

It is an amenable number.

7157536644 is an abundant number, since it is smaller than the sum of its proper divisors (9545180604).

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

7157536644 is a wasteful number, since it uses less digits than its factorization.

7157536644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64235 (or 64233 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 48.

The square root of 7157536644 is about 84602.2259990835. The cubic root of 7157536644 is about 1927.1751782646.

The spelling of 7157536644 in words is "seven billion, one hundred fifty-seven million, five hundred thirty-six thousand, six hundred forty-four".