14878257961221 has 48 divisors (see below), whose sum is σ = 22328077799664. Its totient is φ = 9538897416192.

The previous prime is 14878257961211. The next prime is 14878257961267. The reversal of 14878257961221 is 12216975287841.

14878257961221 is a `hidden beast` number, since 1 + 4 + 8 + 7 + 8 + 2 + 5 + 7 + 9 + 612 + 2 + 1 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 3236016996 + 14875021944225 = 56886^2 + 3856815^2 .

It is not a de Polignac number, because 14878257961221 - 2⁷ = 14878257961093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14878257961211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24670735 + ... + 25266611.

It is an arithmetic number, because the mean of its divisors is an integer number (465168287493).

Almost surely, 2^{14878257961221} is an apocalyptic number.

It is an amenable number.

14878257961221 is a deficient number, since it is larger than the sum of its proper divisors (7449819838443).

14878257961221 is a wasteful number, since it uses less digits than its factorization.

14878257961221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596790 (or 596787 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 63.

The spelling of 14878257961221 in words is "fourteen trillion, eight hundred seventy-eight billion, two hundred fifty-seven million, nine hundred sixty-one thousand, two hundred twenty-one".