51006065615 has 8 divisors (see below), whose sum is σ = 61210602288. Its totient is φ = 40802636800.

The previous prime is 51006065603. The next prime is 51006065659. The reversal of 51006065615 is 51656060015.

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

It is not a de Polignac number, because 51006065615 - 2¹⁶ = 51006000079 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 7 ways as a sum of consecutive naturals, for example, 172061 + ... + 362790.

It is an arithmetic number, because the mean of its divisors is an integer number (7651325286).

Almost surely, 2^51006065615 is an apocalyptic number.

51006065615 is a deficient number, since it is larger than the sum of its proper divisors (10204536673).

51006065615 is a wasteful number, since it uses less digits than its factorization.

51006065615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553929.

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 51006065615 in words is "fifty-one billion, six million, sixty-five thousand, six hundred fifteen".