7664213256 has 32 divisors (see below), whose sum is σ = 21897752640. Its totient is φ = 2189775168.

The previous prime is 7664213251. The next prime is 7664213257. The reversal of 7664213256 is 6523124667.

It is a super-2 number, since 2×7664213256² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (7664213251) 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, 22809991 + ... + 22810326.

It is an arithmetic number, because the mean of its divisors is an integer number (684304770).

Almost surely, 2^7664213256 is an apocalyptic number.

It is an amenable number.

7664213256 is an abundant number, since it is smaller than the sum of its proper divisors (14233539384).

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

7664213256 is a wasteful number, since it uses less digits than its factorization.

7664213256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45620333 (or 45620329 counting only the distinct ones).

The product of its digits is 362880, while the sum is 42.

The square root of 7664213256 is about 87545.4924939028. The cubic root of 7664213256 is about 1971.6168759250.

It can be divided in two parts, 76642 and 13256, that added together give a palindrome (89898).

The spelling of 7664213256 in words is "seven billion, six hundred sixty-four million, two hundred thirteen thousand, two hundred fifty-six".