51182999977 has 4 divisors (see below), whose sum is σ = 51222894480. Its totient is φ = 51143105476.

The previous prime is 51182999971. The next prime is 51182999999. The reversal of 51182999977 is 77999928115.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77999928115 = 5 ⋅15599985623.

It is a cyclic number.

It is not a de Polignac number, because 51182999977 - 2¹⁹ = 51182475689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51182999971) 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, 19945327 + ... + 19947892.

It is an arithmetic number, because the mean of its divisors is an integer number (12805723620).

Almost surely, 2^51182999977 is an apocalyptic number.

It is an amenable number.

51182999977 is a deficient number, since it is larger than the sum of its proper divisors (39894503).

51182999977 is a wasteful number, since it uses less digits than its factorization.

51182999977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39894502.

The product of its digits is 25719120, while the sum is 67.

The spelling of 51182999977 in words is "fifty-one billion, one hundred eighty-two million, nine hundred ninety-nine thousand, nine hundred seventy-seven".