49668639994 has 4 divisors (see below), whose sum is σ = 74502959994. Its totient is φ = 24834319996.

The previous prime is 49668639947. The next prime is 49668639997. The reversal of 49668639994 is 49993686694.

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., 49441746025 + 226893969 = 222355^2 + 15063^2 .

It is not an unprimeable number, because it can be changed into a prime (49668639997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12417159997 + ... + 12417160000.

Almost surely, 2^49668639994 is an apocalyptic number.

49668639994 is a deficient number, since it is larger than the sum of its proper divisors (24834320000).

49668639994 is a wasteful number, since it uses less digits than its factorization.

49668639994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24834319999.

The product of its digits is 544195584, while the sum is 73.

The spelling of 49668639994 in words is "forty-nine billion, six hundred sixty-eight million, six hundred thirty-nine thousand, nine hundred ninety-four".