77474268964 has 27 divisors (see below), whose sum is σ = 140445620497. Its totient is φ = 37393577648.

The previous prime is 77474268943. The next prime is 77474268983. The reversal of 77474268964 is 46986247477.

The square root of 77474268964 is 278342.

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

It can be written as a sum of positive squares in only one way, i.e., 40625627364 + 36848641600 = 201558^2 + 191960^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77474268896 and 77474268905.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 16141437 + ... + 16146235.

Almost surely, 2^77474268964 is an apocalyptic number.

77474268964 is the 278342-nd square number.

It is an amenable number.

77474268964 is a deficient number, since it is larger than the sum of its proper divisors (62971351533).

77474268964 is an frugal number, since it uses more digits than its factorization.

77474268964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9660 (or 4830 counting only the distinct ones).

The product of its digits is 113799168, while the sum is 64.

Multiplying 77474268964 by its sum of digits (64), we get a square (4958353213696 = 2226736²).

The spelling of 77474268964 in words is "seventy-seven billion, four hundred seventy-four million, two hundred sixty-eight thousand, nine hundred sixty-four".