55778914390 has 16 divisors (see below), whose sum is σ = 100410107760. Its totient is φ = 22309774240.

The previous prime is 55778914363. The next prime is 55778914417. The reversal of 55778914390 is 9341987755.

It is an interprime number because it is at equal distance from previous prime (55778914363) and next prime (55778914417).

It is a super-2 number, since 2×55778914390² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 89320 + ... + 345739.

It is an arithmetic number, because the mean of its divisors is an integer number (6275631735).

Almost surely, 2^55778914390 is an apocalyptic number.

55778914390 is a deficient number, since it is larger than the sum of its proper divisors (44631193370).

55778914390 is a wasteful number, since it uses less digits than its factorization.

55778914390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447887.

The product of its (nonzero) digits is 9525600, while the sum is 58.

The spelling of 55778914390 in words is "fifty-five billion, seven hundred seventy-eight million, nine hundred fourteen thousand, three hundred ninety".