2156992464 has 60 divisors (see below), whose sum is σ = 6124864928. Its totient is φ = 653632320.

The previous prime is 2156992459. The next prime is 2156992471. The reversal of 2156992464 is 4642996512.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 179884 + ... + 191499.

Almost surely, 2^2156992464 is an apocalyptic number.

2156992464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2156992464 is an abundant number, since it is smaller than the sum of its proper divisors (3967872464).

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

2156992464 is a wasteful number, since it uses less digits than its factorization.

2156992464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371416 (or 371399 counting only the distinct ones).

The product of its digits is 933120, while the sum is 48.

The square root of 2156992464 is about 46443.4329480498. The cubic root of 2156992464 is about 1292.0605779505.

The spelling of 2156992464 in words is "two billion, one hundred fifty-six million, nine hundred ninety-two thousand, four hundred sixty-four".