51461517603 has 4 divisors (see below), whose sum is σ = 68615356808. Its totient is φ = 34307678400.

The previous prime is 51461517593. The next prime is 51461517623. The reversal of 51461517603 is 30671516415.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 51461517603 - 2⁴ = 51461517587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51461517623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8576919598 + ... + 8576919603.

It is an arithmetic number, because the mean of its divisors is an integer number (17153839202).

Almost surely, 2^51461517603 is an apocalyptic number.

51461517603 is a deficient number, since it is larger than the sum of its proper divisors (17153839205).

51461517603 is a wasteful number, since it uses less digits than its factorization.

51461517603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17153839204.

The product of its (nonzero) digits is 75600, while the sum is 39.

The spelling of 51461517603 in words is "fifty-one billion, four hundred sixty-one million, five hundred seventeen thousand, six hundred three".