51532632449 has 4 divisors (see below), whose sum is σ = 51536372160. Its totient is φ = 51528892740.

The previous prime is 51532632443. The next prime is 51532632479. The reversal of 51532632449 is 94423623515.

It is a happy number.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51532632449 is a prime.

It is a super-2 number, since 2×51532632449² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51532632443) 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, 1849109 + ... + 1876770.

It is an arithmetic number, because the mean of its divisors is an integer number (12884093040).

Almost surely, 2^51532632449 is an apocalyptic number.

It is an amenable number.

51532632449 is a deficient number, since it is larger than the sum of its proper divisors (3739711).

51532632449 is a wasteful number, since it uses less digits than its factorization.

51532632449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3739710.

The product of its digits is 777600, while the sum is 44.

The spelling of 51532632449 in words is "fifty-one billion, five hundred thirty-two million, six hundred thirty-two thousand, four hundred forty-nine".