51011055050505 has 64 divisors (see below), whose sum is σ = 91914228596736. Its totient is φ = 23933614752000.

The previous prime is 51011055050393. The next prime is 51011055050509. The reversal of 51011055050505 is 50505055011015.

It is not a de Polignac number, because 51011055050505 - 2⁹ = 51011055049993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51011055050509) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 107080152 + ... + 107555478.

It is an arithmetic number, because the mean of its divisors is an integer number (1436159821824).

Almost surely, 2^{51011055050505} is an apocalyptic number.

51011055050505 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51011055050505 is a deficient number, since it is larger than the sum of its proper divisors (40903173546231).

51011055050505 is a wasteful number, since it uses less digits than its factorization.

51011055050505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496358.

The product of its (nonzero) digits is 15625, while the sum is 33.

The spelling of 51011055050505 in words is "fifty-one trillion, eleven billion, fifty-five million, fifty thousand, five hundred five".