51632497277 has 4 divisors (see below), whose sum is σ = 51702937980. Its totient is φ = 51562056576.

The previous prime is 51632497219. The next prime is 51632497309. The reversal of 51632497277 is 77279423615.

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

It can be written as a sum of positive squares in 2 ways, for example, as 25163159641 + 26469337636 = 158629^2 + 162694^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51632497277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51632493277) 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, 35219252 + ... + 35220717.

It is an arithmetic number, because the mean of its divisors is an integer number (12925734495).

Almost surely, 2^51632497277 is an apocalyptic number.

It is an amenable number.

51632497277 is a deficient number, since it is larger than the sum of its proper divisors (70440703).

51632497277 is an equidigital number, since it uses as much as digits as its factorization.

51632497277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70440702.

The product of its digits is 4445280, while the sum is 53.

The spelling of 51632497277 in words is "fifty-one billion, six hundred thirty-two million, four hundred ninety-seven thousand, two hundred seventy-seven".