55135764 has 18 divisors (see below), whose sum is σ = 139371050. Its totient is φ = 18378576.

The previous prime is 55135733. The next prime is 55135781. The reversal of 55135764 is 46753155.

55135764 is a `hidden beast` number, since 551 + 35 + 76 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 52272900 + 2862864 = 7230^2 + 1692^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1531549 = 55135764 / (5 + 5 + 1 + 3 + 5 + 7 + 6 + 4).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 765739 + ... + 765810.

Almost surely, 2^55135764 is an apocalyptic number.

It is an amenable number.

55135764 is an abundant number, since it is smaller than the sum of its proper divisors (84235286).

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

55135764 is a wasteful number, since it uses less digits than its factorization.

55135764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531559 (or 1531554 counting only the distinct ones).

The product of its digits is 63000, while the sum is 36.

The square root of 55135764 is about 7425.3460525419. The cubic root of 55135764 is about 380.6079004993.

It can be divided in two parts, 551 and 35764, that added together give a triangular number (36315 = T₂₆₉).

The spelling of 55135764 in words is "fifty-five million, one hundred thirty-five thousand, seven hundred sixty-four".