15402220780 has 24 divisors (see below), whose sum is σ = 32754093120. Its totient is φ = 6082901760.

The previous prime is 15402220727. The next prime is 15402220793. The reversal of 15402220780 is 8702220451.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4872541 + ... + 4875700.

It is an arithmetic number, because the mean of its divisors is an integer number (1364753880).

Almost surely, 2^15402220780 is an apocalyptic number.

15402220780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15402220780 is an abundant number, since it is smaller than the sum of its proper divisors (17351872340).

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

15402220780 is a wasteful number, since it uses less digits than its factorization.

15402220780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9748329 (or 9748327 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 31.

The spelling of 15402220780 in words is "fifteen billion, four hundred two million, two hundred twenty thousand, seven hundred eighty".