55136642940 has 72 divisors (see below), whose sum is σ = 167274416400. Its totient is φ = 14700766464.

The previous prime is 55136642933. The next prime is 55136642947. The reversal of 55136642940 is 4924663155.

55136642940 is a `hidden beast` number, since 5 + 513 + 6 + 6 + 42 + 94 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (55136642933) and next prime (55136642947).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55136642947) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1314411 + ... + 1355709.

Almost surely, 2^55136642940 is an apocalyptic number.

It is an amenable number.

55136642940 is an abundant number, since it is smaller than the sum of its proper divisors (112137773460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55136642940 is a wasteful number, since it uses less digits than its factorization.

55136642940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48731 (or 48726 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 55136642940 in words is "fifty-five billion, one hundred thirty-six million, six hundred forty-two thousand, nine hundred forty".