77349621924 has 45 divisors (see below), whose sum is σ = 202220278491. Its totient is φ = 25781538600.

The previous prime is 77349621913. The next prime is 77349621949. The reversal of 77349621924 is 42912694377.

The square root of 77349621924 is 278118.

It is a perfect power (a square), and thus also a powerful number.

77349621924 is a `hidden beast` number, since 7 + 7 + 3 + 4 + 9 + 621 + 9 + 2 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 4998399 + ... + 5013849.

Almost surely, 2^77349621924 is an apocalyptic number.

77349621924 is the 278118-th square number.

It is an amenable number.

77349621924 is an abundant number, since it is smaller than the sum of its proper divisors (124870656567).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77349621924 is an frugal number, since it uses more digits than its factorization.

77349621924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30918 (or 15456 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 54.

The spelling of 77349621924 in words is "seventy-seven billion, three hundred forty-nine million, six hundred twenty-one thousand, nine hundred twenty-four".