56405980278 has 24 divisors (see below), whose sum is σ = 122220277608. Its totient is φ = 18800867232.

The previous prime is 56405980273. The next prime is 56405980283. The reversal of 56405980278 is 87208950465.

56405980278 is a `hidden beast` number, since 5 + 6 + 40 + 598 + 0 + 2 + 7 + 8 = 666.

56405980278 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (56405980273) and next prime (56405980283).

It is a super-2 number, since 2×56405980278² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56405980273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 248826 + ... + 418002.

It is an arithmetic number, because the mean of its divisors is an integer number (5092511567).

Almost surely, 2^56405980278 is an apocalyptic number.

56405980278 is an abundant number, since it is smaller than the sum of its proper divisors (65814297330).

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

56405980278 is a wasteful number, since it uses less digits than its factorization.

56405980278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187708 (or 187705 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 54.

The spelling of 56405980278 in words is "fifty-six billion, four hundred five million, nine hundred eighty thousand, two hundred seventy-eight".