77242693738 has 32 divisors (see below), whose sum is σ = 137965068288. Its totient is φ = 31736718000.

The previous prime is 77242693733. The next prime is 77242693753. The reversal of 77242693738 is 83739624277.

It is not an unprimeable number, because it can be changed into a prime (77242693733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 785238 + ... + 878113.

It is an arithmetic number, because the mean of its divisors is an integer number (4311408384).

Almost surely, 2^77242693738 is an apocalyptic number.

77242693738 is a deficient number, since it is larger than the sum of its proper divisors (60722374550).

77242693738 is a wasteful number, since it uses less digits than its factorization.

77242693738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1663498.

The product of its digits is 21337344, while the sum is 58.

The spelling of 77242693738 in words is "seventy-seven billion, two hundred forty-two million, six hundred ninety-three thousand, seven hundred thirty-eight".