55633765 has 16 divisors (see below), whose sum is σ = 72985536. Its totient is φ = 40374400.

The previous prime is 55633751. The next prime is 55633771. The reversal of 55633765 is 56733655.

It is not a de Polignac number, because 55633765 - 2¹³ = 55625573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36825 + ... + 38305.

It is an arithmetic number, because the mean of its divisors is an integer number (4561596).

Almost surely, 2^55633765 is an apocalyptic number.

55633765 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55633765 is a deficient number, since it is larger than the sum of its proper divisors (17351771).

55633765 is a wasteful number, since it uses less digits than its factorization.

55633765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2180.

The product of its digits is 283500, while the sum is 40.

The square root of 55633765 is about 7458.8045288773. The cubic root of 55633765 is about 381.7503851573.

It can be divided in two parts, 55 and 633765, that multiplied together give a triangular number (34857075 = T₈₃₄₉).

The spelling of 55633765 in words is "fifty-five million, six hundred thirty-three thousand, seven hundred sixty-five".