56138949946 has 4 divisors (see below), whose sum is σ = 84208424922. Its totient is φ = 28069474972.

The previous prime is 56138949943. The next prime is 56138949967. The reversal of 56138949946 is 64994983165.

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., 44708988025 + 11429961921 = 211445^2 + 106911^2 .

It is not an unprimeable number, because it can be changed into a prime (56138949943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14034737485 + ... + 14034737488.

Almost surely, 2^56138949946 is an apocalyptic number.

56138949946 is a deficient number, since it is larger than the sum of its proper divisors (28069474976).

56138949946 is a wasteful number, since it uses less digits than its factorization.

56138949946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28069474975.

The product of its digits is 50388480, while the sum is 64.

The spelling of 56138949946 in words is "fifty-six billion, one hundred thirty-eight million, nine hundred forty-nine thousand, nine hundred forty-six".