51877644503 has 4 divisors (see below), whose sum is σ = 54133194288. Its totient is φ = 49622094720.

The previous prime is 51877644473. The next prime is 51877644521. The reversal of 51877644503 is 30544677815.

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

It is a cyclic number.

It is not a de Polignac number, because 51877644503 - 2²² = 51873450199 is a prime.

It is a super-2 number, since 2×51877644503² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51877644103) 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, 1127774858 + ... + 1127774903.

It is an arithmetic number, because the mean of its divisors is an integer number (13533298572).

Almost surely, 2^51877644503 is an apocalyptic number.

51877644503 is a deficient number, since it is larger than the sum of its proper divisors (2255549785).

51877644503 is a wasteful number, since it uses less digits than its factorization.

51877644503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2255549784.

The product of its (nonzero) digits is 2822400, while the sum is 50.

The spelling of 51877644503 in words is "fifty-one billion, eight hundred seventy-seven million, six hundred forty-four thousand, five hundred three".