51015061651 has 8 divisors (see below), whose sum is σ = 51725180304. Its totient is φ = 50307216480.

The previous prime is 51015061633. The next prime is 51015061667. The reversal of 51015061651 is 15616051015.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51015061651 - 2⁷ = 51015061523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51015061451) 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, 523156 + ... + 612961.

It is an arithmetic number, because the mean of its divisors is an integer number (6465647538).

Almost surely, 2^51015061651 is an apocalyptic number.

51015061651 is a deficient number, since it is larger than the sum of its proper divisors (710118653).

51015061651 is a wasteful number, since it uses less digits than its factorization.

51015061651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136741.

The product of its (nonzero) digits is 4500, while the sum is 31.

It can be divided in two parts, 510 and 15061651, that added together give a square (15062161 = 3881²).

The spelling of 51015061651 in words is "fifty-one billion, fifteen million, sixty-one thousand, six hundred fifty-one".