55779655 has 4 divisors (see below), whose sum is σ = 66935592. Its totient is φ = 44623720.

The previous prime is 55779653. The next prime is 55779667. The reversal of 55779655 is 55697755.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 55779655 - 2¹ = 55779653 is a prime.

It is a super-2 number, since 2×55779655² = 6222739823838050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55779599 and 55779608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55779653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5577961 + ... + 5577970.

It is an arithmetic number, because the mean of its divisors is an integer number (16733898).

Almost surely, 2^55779655 is an apocalyptic number.

55779655 is a deficient number, since it is larger than the sum of its proper divisors (11155937).

55779655 is a wasteful number, since it uses less digits than its factorization.

55779655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11155936.

The product of its digits is 1653750, while the sum is 49.

The square root of 55779655 is about 7468.5778432042. The cubic root of 55779655 is about 382.0837855196.

The spelling of 55779655 in words is "fifty-five million, seven hundred seventy-nine thousand, six hundred fifty-five".