278372220057 has 12 divisors (see below), whose sum is σ = 402862034224. Its totient is φ = 185226636600.

The previous prime is 278372220043. The next prime is 278372220083. The reversal of 278372220057 is 750022273872.

278372220057 is a `hidden beast` number, since 2 + 7 + 8 + 372 + 220 + 0 + 57 = 666.

It is not a de Polignac number, because 278372220057 - 2¹⁶ = 278372154521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 278372219994 and 278372220021.

It is not an unprimeable number, because it can be changed into a prime (278372220257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29565319 + ... + 29574732.

Almost surely, 2^278372220057 is an apocalyptic number.

It is an amenable number.

278372220057 is a deficient number, since it is larger than the sum of its proper divisors (124489814167).

278372220057 is a wasteful number, since it uses less digits than its factorization.

278372220057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59140580 (or 59140577 counting only the distinct ones).

The product of its (nonzero) digits is 658560, while the sum is 45.

The spelling of 278372220057 in words is "two hundred seventy-eight billion, three hundred seventy-two million, two hundred twenty thousand, fifty-seven".