90179663418 has 128 divisors (see below), whose sum is σ = 222069120000. Its totient is φ = 27291660480.

The previous prime is 90179663417. The next prime is 90179663429. The reversal of 90179663418 is 81436697109.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (90179663417) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3455583 + ... + 3481581.

It is an arithmetic number, because the mean of its divisors is an integer number (1734915000).

Almost surely, 2^90179663418 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90179663418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111034560000).

90179663418 is an abundant number, since it is smaller than the sum of its proper divisors (131889456582).

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

90179663418 is a wasteful number, since it uses less digits than its factorization.

90179663418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26096 (or 26078 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The spelling of 90179663418 in words is "ninety billion, one hundred seventy-nine million, six hundred sixty-three thousand, four hundred eighteen".