49039904042 has 4 divisors (see below), whose sum is σ = 73559856066. Its totient is φ = 24519952020.

The previous prime is 49039904027. The next prime is 49039904047. The reversal of 49039904042 is 24040993094.

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., 40064425921 + 8975478121 = 200161^2 + 94739^2 .

It is a junction number, because it is equal to n+sod(n) for n = 49039903984 and 49039904002.

It is not an unprimeable number, because it can be changed into a prime (49039904047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12259976009 + ... + 12259976012.

Almost surely, 2^49039904042 is an apocalyptic number.

49039904042 is a deficient number, since it is larger than the sum of its proper divisors (24519952024).

49039904042 is a wasteful number, since it uses less digits than its factorization.

49039904042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24519952023.

The product of its (nonzero) digits is 279936, while the sum is 44.

The spelling of 49039904042 in words is "forty-nine billion, thirty-nine million, nine hundred four thousand, forty-two".