53756649 has 8 divisors (see below), whose sum is σ = 79639520. Its totient is φ = 35837748.

The previous prime is 53756639. The next prime is 53756653. The reversal of 53756649 is 94665735.

53756649 is a `hidden beast` number, since 537 + 56 + 64 + 9 = 666.

It is not a de Polignac number, because 53756649 - 2⁸ = 53756393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53756609) 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, 995467 + ... + 995520.

It is an arithmetic number, because the mean of its divisors is an integer number (9954940).

Almost surely, 2^53756649 is an apocalyptic number.

It is an amenable number.

53756649 is a deficient number, since it is larger than the sum of its proper divisors (25882871).

53756649 is a wasteful number, since it uses less digits than its factorization.

53756649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990996 (or 1990990 counting only the distinct ones).

The product of its digits is 680400, while the sum is 45.

The square root of 53756649 is about 7331.8925933213. The cubic root of 53756649 is about 377.4076765002.

The spelling of 53756649 in words is "fifty-three million, seven hundred fifty-six thousand, six hundred forty-nine".