49751818 has 4 divisors (see below), whose sum is σ = 74627730. Its totient is φ = 24875908.

The previous prime is 49751813. The next prime is 49751827. The reversal of 49751818 is 81815794.

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., 40793769 + 8958049 = 6387^2 + 2993^2 .

It is not an unprimeable number, because it can be changed into a prime (49751813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12437953 + ... + 12437956.

Almost surely, 2^49751818 is an apocalyptic number.

49751818 is a deficient number, since it is larger than the sum of its proper divisors (24875912).

49751818 is a wasteful number, since it uses less digits than its factorization.

49751818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24875911.

The product of its digits is 80640, while the sum is 43.

The square root of 49751818 is about 7053.4968632587. The cubic root of 49751818 is about 367.7925983574.

The spelling of 49751818 in words is "forty-nine million, seven hundred fifty-one thousand, eight hundred eighteen".