11977764340 has 12 divisors (see below), whose sum is σ = 25153305156. Its totient is φ = 4791105728.

The previous prime is 11977764311. The next prime is 11977764343. The reversal of 11977764340 is 4346777911.

It can be written as a sum of positive squares in 2 ways, for example, as 2505803364 + 9471960976 = 50058^2 + 97324^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11977764343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299444089 + ... + 299444128.

It is an arithmetic number, because the mean of its divisors is an integer number (2096108763).

Almost surely, 2^11977764340 is an apocalyptic number.

11977764340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11977764340 is an abundant number, since it is smaller than the sum of its proper divisors (13175540816).

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

11977764340 is a wasteful number, since it uses less digits than its factorization.

11977764340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598888226 (or 598888224 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 49.

The spelling of 11977764340 in words is "eleven billion, nine hundred seventy-seven million, seven hundred sixty-four thousand, three hundred forty".