278473962660 has 24 divisors (see below), whose sum is σ = 779727095616. Its totient is φ = 74259723360.

The previous prime is 278473962553. The next prime is 278473962677. The reversal of 278473962660 is 66269374872.

It is a Harshad number since it is a multiple of its sum of digits (60), and also a Moran number because the ratio is a prime number: 4641232711 = 278473962660 / (2 + 7 + 8 + 4 + 7 + 3 + 9 + 6 + 2 + 6 + 6 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 278473962594 and 278473962603.

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, 2320616296 + ... + 2320616415.

It is an arithmetic number, because the mean of its divisors is an integer number (32488628984).

Almost surely, 2^278473962660 is an apocalyptic number.

278473962660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

278473962660 is an abundant number, since it is smaller than the sum of its proper divisors (501253132956).

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

278473962660 is a wasteful number, since it uses less digits than its factorization.

278473962660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4641232723 (or 4641232721 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 60.

The spelling of 278473962660 in words is "two hundred seventy-eight billion, four hundred seventy-three million, nine hundred sixty-two thousand, six hundred sixty".