53640991827 has 40 divisors (see below), whose sum is σ = 81538657200. Its totient is φ = 35132921856.

The previous prime is 53640991823. The next prime is 53640991879. The reversal of 53640991827 is 72819904635.

53640991827 is a `hidden beast` number, since 53 + 6 + 409 + 9 + 182 + 7 = 666.

It is not a de Polignac number, because 53640991827 - 2² = 53640991823 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53640991823) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 12504499 + ... + 12508787.

It is an arithmetic number, because the mean of its divisors is an integer number (2038466430).

It is a 2-persistent number, because it is pandigital, and so is 2⋅53640991827 = 107281983654, but 3⋅53640991827 = 160922975481 is not.

Almost surely, 2^53640991827 is an apocalyptic number.

53640991827 is the 115803-rd decagonal number.

53640991827 is a deficient number, since it is larger than the sum of its proper divisors (27897665373).

53640991827 is a wasteful number, since it uses less digits than its factorization.

53640991827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6977 (or 6968 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 53640991827 in words is "fifty-three billion, six hundred forty million, nine hundred ninety-one thousand, eight hundred twenty-seven".