2152764644 has 6 divisors (see below), whose sum is σ = 3767338134. Its totient is φ = 1076382320.

The previous prime is 2152764637. The next prime is 2152764697. The reversal of 2152764644 is 4464672512.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1663824100 + 488940544 = 40790^2 + 22112^2 .

It is a super-2 number, since 2×2152764644² = 9268791224912893472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269095577 + ... + 269095584.

It is an arithmetic number, because the mean of its divisors is an integer number (627889689).

Almost surely, 2^2152764644 is an apocalyptic number.

It is an amenable number.

2152764644 is a deficient number, since it is larger than the sum of its proper divisors (1614573490).

2152764644 is a wasteful number, since it uses less digits than its factorization.

2152764644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538191165 (or 538191163 counting only the distinct ones).

The product of its digits is 322560, while the sum is 41.

The square root of 2152764644 is about 46397.8948229335. The cubic root of 2152764644 is about 1291.2158566498.

The spelling of 2152764644 in words is "two billion, one hundred fifty-two million, seven hundred sixty-four thousand, six hundred forty-four".