12402977780 has 48 divisors (see below), whose sum is σ = 26323315200. Its totient is φ = 4908507648.

The previous prime is 12402977777. The next prime is 12402977809. The reversal of 12402977780 is 8777920421.

It is a super-2 number, since 2×12402977780² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 3061196 + ... + 3065244.

It is an arithmetic number, because the mean of its divisors is an integer number (548402400).

Almost surely, 2^12402977780 is an apocalyptic number.

12402977780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12402977780 is an abundant number, since it is smaller than the sum of its proper divisors (13920337420).

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

12402977780 is a wasteful number, since it uses less digits than its factorization.

12402977780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5648 (or 5646 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 47.

The spelling of 12402977780 in words is "twelve billion, four hundred two million, nine hundred seventy-seven thousand, seven hundred eighty".