11977551364 has 9 divisors (see below), whose sum is σ = 20961097941. Its totient is φ = 5988666240.

The previous prime is 11977551353. The next prime is 11977551407. The reversal of 11977551364 is 46315577911.

It is a happy number.

The square root of 11977551364 is 109442.

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

11977551364 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8659791364 + 3317760000 = 93058^2 + 57600^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 191524 + ... + 246244.

Almost surely, 2^11977551364 is an apocalyptic number.

11977551364 is the 109442-nd square number.

It is an amenable number.

11977551364 is a deficient number, since it is larger than the sum of its proper divisors (8983546577).

11977551364 is an frugal number, since it uses more digits than its factorization.

11977551364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109446 (or 54723 counting only the distinct ones).

The product of its digits is 793800, while the sum is 49.

Multiplying 11977551364 by its sum of digits (49), we get a square (586900016836 = 766094²).

The spelling of 11977551364 in words is "eleven billion, nine hundred seventy-seven million, five hundred fifty-one thousand, three hundred sixty-four".