51501655001606 has 16 divisors (see below), whose sum is σ = 77748821283840. Its totient is φ = 25585899069960.

The previous prime is 51501655001581. The next prime is 51501655001627. The reversal of 51501655001606 is 60610055610515.

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, 129258176 + ... + 129656003.

It is an arithmetic number, because the mean of its divisors is an integer number (4859301330240).

Almost surely, 2^{51501655001606} is an apocalyptic number.

51501655001606 is a deficient number, since it is larger than the sum of its proper divisors (26247166282234).

51501655001606 is a wasteful number, since it uses less digits than its factorization.

51501655001606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258914819.

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 51501655001606 in words is "fifty-one trillion, five hundred one billion, six hundred fifty-five million, one thousand, six hundred six".