2051564736 has 56 divisors (see below), whose sum is σ = 5845651504. Its totient is φ = 631249920.

The previous prime is 2051564707. The next prime is 2051564737. The reversal of 2051564736 is 6374651502.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 2051564694 and 2051564703.

It is not an unprimeable number, because it can be changed into a prime (2051564737) 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, 408475 + ... + 413466.

It is an arithmetic number, because the mean of its divisors is an integer number (104386634).

Almost surely, 2^2051564736 is an apocalyptic number.

2051564736 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2051564736 is an abundant number, since it is smaller than the sum of its proper divisors (3794086768).

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

2051564736 is a wasteful number, since it uses less digits than its factorization.

2051564736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821969 (or 821959 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 39.

The square root of 2051564736 is about 45294.2020130612. The cubic root of 2051564736 is about 1270.6572199211.

The spelling of 2051564736 in words is "two billion, fifty-one million, five hundred sixty-four thousand, seven hundred thirty-six".