55874565 has 36 divisors (see below), whose sum is σ = 98615556. Its totient is φ = 29265408.

The previous prime is 55874557. The next prime is 55874591. The reversal of 55874565 is 56547855.

55874565 is a `hidden beast` number, since 5 + 5 + 87 + 4 + 565 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 1454436 + 54420129 = 1206^2 + 7377^2 .

It is not a de Polignac number, because 55874565 - 2³ = 55874557 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 55874565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 239689 + ... + 239921.

It is an arithmetic number, because the mean of its divisors is an integer number (2739321).

Almost surely, 2^55874565 is an apocalyptic number.

It is an amenable number.

55874565 is a deficient number, since it is larger than the sum of its proper divisors (42740991).

55874565 is a wasteful number, since it uses less digits than its factorization.

55874565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390 (or 314 counting only the distinct ones).

The product of its digits is 840000, while the sum is 45.

The square root of 55874565 is about 7474.9290966537. The cubic root of 55874565 is about 382.3003700061.

The spelling of 55874565 in words is "fifty-five million, eight hundred seventy-four thousand, five hundred sixty-five".