2151658944 has 112 divisors (see below), whose sum is σ = 6543751200. Its totient is φ = 692471808.

The previous prime is 2151658937. The next prime is 2151658963. The reversal of 2151658944 is 4498561512.

2151658944 is a `hidden beast` number, since 2 + 15 + 16 + 589 + 44 = 666.

It is a super-2 number, since 2×2151658944² = 9259272422590390272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2151658944.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28644 + ... + 71580.

It is an arithmetic number, because the mean of its divisors is an integer number (58426350).

Almost surely, 2^2151658944 is an apocalyptic number.

2151658944 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 2151658944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3271875600).

2151658944 is an abundant number, since it is smaller than the sum of its proper divisors (4392092256).

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

2151658944 is a wasteful number, since it uses less digits than its factorization.

2151658944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42987 (or 42971 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The square root of 2151658944 is about 46385.9778812520. The cubic root of 2151658944 is about 1290.9947546238.

The spelling of 2151658944 in words is "two billion, one hundred fifty-one million, six hundred fifty-eight thousand, nine hundred forty-four".