278457077106 has 32 divisors (see below), whose sum is σ = 666393006720. Its totient is φ = 85679100432.

The previous prime is 278457077009. The next prime is 278457077111. The reversal of 278457077106 is 601770754872.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198330550 + ... + 198331953.

It is an arithmetic number, because the mean of its divisors is an integer number (20824781460).

Almost surely, 2^278457077106 is an apocalyptic number.

278457077106 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

278457077106 is an abundant number, since it is smaller than the sum of its proper divisors (387935929614).

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

278457077106 is a wasteful number, since it uses less digits than its factorization.

278457077106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396662527 (or 396662521 counting only the distinct ones).

The product of its (nonzero) digits is 4609920, while the sum is 54.

The spelling of 278457077106 in words is "two hundred seventy-eight billion, four hundred fifty-seven million, seventy-seven thousand, one hundred six".