15220455278 has 16 divisors (see below), whose sum is σ = 26647363584. Its totient is φ = 6384263640.

The previous prime is 15220455269. The next prime is 15220455281. The reversal of 15220455278 is 87255402251.

It is a congruent 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, 11565038 + ... + 11566353.

It is an arithmetic number, because the mean of its divisors is an integer number (1665460224).

Almost surely, 2^15220455278 is an apocalyptic number.

15220455278 is a deficient number, since it is larger than the sum of its proper divisors (11426908306).

15220455278 is a wasteful number, since it uses less digits than its factorization.

15220455278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23131447.

The product of its (nonzero) digits is 224000, while the sum is 41.

The spelling of 15220455278 in words is "fifteen billion, two hundred twenty million, four hundred fifty-five thousand, two hundred seventy-eight".