55778413390 has 32 divisors (see below), whose sum is σ = 114754843584. Its totient is φ = 19122247680.

The previous prime is 55778413343. The next prime is 55778413393. The reversal of 55778413390 is 9331487755.

It is a super-2 number, since 2×55778413390² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55778413393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 882030 + ... + 943150.

It is an arithmetic number, because the mean of its divisors is an integer number (3586088862).

Almost surely, 2^55778413390 is an apocalyptic number.

55778413390 is an abundant number, since it is smaller than the sum of its proper divisors (58976430194).

55778413390 is a wasteful number, since it uses less digits than its factorization.

55778413390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74172.

The product of its (nonzero) digits is 3175200, while the sum is 52.

The spelling of 55778413390 in words is "fifty-five billion, seven hundred seventy-eight million, four hundred thirteen thousand, three hundred ninety".