77200124242 has 4 divisors (see below), whose sum is σ = 115800186366. Its totient is φ = 38600062120.

The previous prime is 77200124237. The next prime is 77200124263. The reversal of 77200124242 is 24242100277.

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., 60692756881 + 16507367361 = 246359^2 + 128481^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19300031059 + ... + 19300031062.

Almost surely, 2^77200124242 is an apocalyptic number.

77200124242 is a deficient number, since it is larger than the sum of its proper divisors (38600062124).

77200124242 is a wasteful number, since it uses less digits than its factorization.

77200124242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38600062123.

The product of its (nonzero) digits is 12544, while the sum is 31.

The spelling of 77200124242 in words is "seventy-seven billion, two hundred million, one hundred twenty-four thousand, two hundred forty-two".