64180974 has 128 divisors (see below), whose sum is σ = 165150720. Its totient is φ = 16329600.

The previous prime is 64180969. The next prime is 64180981. The reversal of 64180974 is 47908146.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 505299 + ... + 505425.

It is an arithmetic number, because the mean of its divisors is an integer number (1290240).

Almost surely, 2^64180974 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64180974, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82575360).

64180974 is an abundant number, since it is smaller than the sum of its proper divisors (100969746).

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

64180974 is a wasteful number, since it uses less digits than its factorization.

64180974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 64180974 is about 8011.3028902919. The cubic root of 64180974 is about 400.3766743464.

The spelling of 64180974 in words is "sixty-four million, one hundred eighty thousand, nine hundred seventy-four".