56431721498 has 4 divisors (see below), whose sum is σ = 84647582250. Its totient is φ = 28215860748.

The previous prime is 56431721393. The next prime is 56431721501. The reversal of 56431721498 is 89412713465.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 55621920649 + 809800849 = 235843^2 + 28457^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14107930373 + ... + 14107930376.

Almost surely, 2^56431721498 is an apocalyptic number.

56431721498 is a deficient number, since it is larger than the sum of its proper divisors (28215860752).

56431721498 is a wasteful number, since it uses less digits than its factorization.

56431721498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28215860751.

The product of its digits is 1451520, while the sum is 50.

The spelling of 56431721498 in words is "fifty-six billion, four hundred thirty-one million, seven hundred twenty-one thousand, four hundred ninety-eight".