51613635655 has 24 divisors (see below), whose sum is σ = 65823457392. Its totient is φ = 38844628992.

The previous prime is 51613635649. The next prime is 51613635673. The reversal of 51613635655 is 55653631615.

It is not a de Polignac number, because 51613635655 - 2¹³ = 51613627463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3870279 + ... + 3883591.

It is an arithmetic number, because the mean of its divisors is an integer number (2742644058).

Almost surely, 2^51613635655 is an apocalyptic number.

51613635655 is a deficient number, since it is larger than the sum of its proper divisors (14209821737).

51613635655 is a wasteful number, since it uses less digits than its factorization.

51613635655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16035 (or 16018 counting only the distinct ones).

The product of its digits is 1215000, while the sum is 46.

The spelling of 51613635655 in words is "fifty-one billion, six hundred thirteen million, six hundred thirty-five thousand, six hundred fifty-five".