55417780418 has 64 divisors (see below), whose sum is σ = 111682029312. Its totient is φ = 19917722880.

The previous prime is 55417780391. The next prime is 55417780427. The reversal of 55417780418 is 81408771455.

It is a happy number.

It is a super-2 number, since 2×55417780418² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3461480 + ... + 3477452.

It is an arithmetic number, because the mean of its divisors is an integer number (1745031708).

Almost surely, 2^55417780418 is an apocalyptic number.

55417780418 is an abundant number, since it is smaller than the sum of its proper divisors (56264248894).

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

55417780418 is a wasteful number, since it uses less digits than its factorization.

55417780418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17739.

The product of its (nonzero) digits is 1254400, while the sum is 50.

The spelling of 55417780418 in words is "fifty-five billion, four hundred seventeen million, seven hundred eighty thousand, four hundred eighteen".