2157962664 has 128 divisors (see below), whose sum is σ = 6389268480. Its totient is φ = 598752000.

The previous prime is 2157962663. The next prime is 2157962671. The reversal of 2157962664 is 4662697512.

It is not an unprimeable number, because it can be changed into a prime (2157962663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 433389 + ... + 438339.

It is an arithmetic number, because the mean of its divisors is an integer number (49916160).

Almost surely, 2^2157962664 is an apocalyptic number.

2157962664 is a gapful number since it is divisible by the number (24) 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 2157962664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3194634240).

2157962664 is an abundant number, since it is smaller than the sum of its proper divisors (4231305816).

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

2157962664 is a wasteful number, since it uses less digits than its factorization.

2157962664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5111 (or 5107 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 48.

The square root of 2157962664 is about 46453.8767381152. The cubic root of 2157962664 is about 1292.2542688255.

The spelling of 2157962664 in words is "two billion, one hundred fifty-seven million, nine hundred sixty-two thousand, six hundred sixty-four".