51766020729 has 8 divisors (see below), whose sum is σ = 76690401120. Its totient is φ = 34510680468.

The previous prime is 51766020727. The next prime is 51766020737. The reversal of 51766020729 is 92702066715.

51766020729 is a `hidden beast` number, since 5 + 17 + 6 + 602 + 0 + 7 + 29 = 666.

It is not a de Polignac number, because 51766020729 - 2¹ = 51766020727 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51766020727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 958629987 + ... + 958630040.

It is an arithmetic number, because the mean of its divisors is an integer number (9586300140).

Almost surely, 2^51766020729 is an apocalyptic number.

It is an amenable number.

51766020729 is a deficient number, since it is larger than the sum of its proper divisors (24924380391).

51766020729 is a wasteful number, since it uses less digits than its factorization.

51766020729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1917260036 (or 1917260030 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The spelling of 51766020729 in words is "fifty-one billion, seven hundred sixty-six million, twenty thousand, seven hundred twenty-nine".