278880178413 has 16 divisors (see below), whose sum is σ = 391479320000. Its totient is φ = 176104005120.

The previous prime is 278880178393. The next prime is 278880178457. The reversal of 278880178413 is 314871088872.

It is not a de Polignac number, because 278880178413 - 2²⁸ = 278611742957 is a prime.

It is a super-2 number, since 2×278880178413² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278880178483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97828 + ... + 753213.

It is an arithmetic number, because the mean of its divisors is an integer number (24467457500).

Almost surely, 2^278880178413 is an apocalyptic number.

It is an amenable number.

278880178413 is a deficient number, since it is larger than the sum of its proper divisors (112599141587).

278880178413 is a wasteful number, since it uses less digits than its factorization.

278880178413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856812.

The product of its (nonzero) digits is 4816896, while the sum is 57.

The spelling of 278880178413 in words is "two hundred seventy-eight billion, eight hundred eighty million, one hundred seventy-eight thousand, four hundred thirteen".