55775797 has 12 divisors (see below), whose sum is σ = 70066528. Its totient is φ = 43461000.

The previous prime is 55775779. The next prime is 55775803. The reversal of 55775797 is 79757755.

It is not a de Polignac number, because 55775797 - 2¹⁹ = 55251509 is a prime.

It is a super-2 number, since 2×55775797² = 6221879061970418, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55775717) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32079 + ... + 33772.

Almost surely, 2^55775797 is an apocalyptic number.

It is an amenable number.

55775797 is a deficient number, since it is larger than the sum of its proper divisors (14290731).

55775797 is a wasteful number, since it uses less digits than its factorization.

55775797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65880 (or 65869 counting only the distinct ones).

The product of its digits is 2701125, while the sum is 52.

The square root of 55775797 is about 7468.3195566339. The cubic root of 55775797 is about 382.0749763744.

The spelling of 55775797 in words is "fifty-five million, seven hundred seventy-five thousand, seven hundred ninety-seven".