51634764 has 36 divisors (see below), whose sum is σ = 133302624. Its totient is φ = 16844832.

The previous prime is 51634753. The next prime is 51634777. The reversal of 51634764 is 46743615.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×51634764² = 5332297706671392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13567 + ... + 16950.

Almost surely, 2^51634764 is an apocalyptic number.

It is an amenable number.

51634764 is an abundant number, since it is smaller than the sum of its proper divisors (81667860).

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

51634764 is a wasteful number, since it uses less digits than its factorization.

51634764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30574 (or 30569 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 51634764 is about 7185.7333654958. The cubic root of 51634764 is about 372.3751851242.

The spelling of 51634764 in words is "fifty-one million, six hundred thirty-four thousand, seven hundred sixty-four".