51366178633 has 12 divisors (see below), whose sum is σ = 64526109760. Its totient is φ = 40025593080.

The previous prime is 51366178613. The next prime is 51366178651. The reversal of 51366178633 is 33687166315.

It is not a de Polignac number, because 51366178633 - 2¹³ = 51366170441 is a prime.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (51366178613) 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, 30321573 + ... + 30323266.

Almost surely, 2^51366178633 is an apocalyptic number.

It is an amenable number.

51366178633 is a deficient number, since it is larger than the sum of its proper divisors (13159931127).

51366178633 is a wasteful number, since it uses less digits than its factorization.

51366178633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60644868 (or 60644857 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 49.

The spelling of 51366178633 in words is "fifty-one billion, three hundred sixty-six million, one hundred seventy-eight thousand, six hundred thirty-three".