55897839729 has 6 divisors (see below), whose sum is σ = 80741324066. Its totient is φ = 37265226480.

The previous prime is 55897839727. The next prime is 55897839731. The reversal of 55897839729 is 92793879855.

55897839729 is a `hidden beast` number, since 5 + 589 + 7 + 8 + 39 + 7 + 2 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (55897839727) and next prime (55897839731).

It can be written as a sum of positive squares in only one way, i.e., 55402332129 + 495507600 = 235377^2 + 22260^2 .

It is not a de Polignac number, because 55897839729 - 2¹ = 55897839727 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55897839721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3105435532 + ... + 3105435549.

Almost surely, 2^55897839729 is an apocalyptic number.

It is an amenable number.

55897839729 is a deficient number, since it is larger than the sum of its proper divisors (24843484337).

55897839729 is a wasteful number, since it uses less digits than its factorization.

55897839729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6210871087 (or 6210871084 counting only the distinct ones).

The product of its digits is 342921600, while the sum is 72.

The spelling of 55897839729 in words is "fifty-five billion, eight hundred ninety-seven million, eight hundred thirty-nine thousand, seven hundred twenty-nine".