74447486646 has 64 divisors (see below), whose sum is σ = 162676200960. Its totient is φ = 22576055040.

The previous prime is 74447486599. The next prime is 74447486651. The reversal of 74447486646 is 64668474447.

It is a self number, because there is not a number n which added to its sum of digits gives 74447486646.

It is a congruent number.

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, 2141721 + ... + 2176203.

It is an arithmetic number, because the mean of its divisors is an integer number (2541815640).

Almost surely, 2^74447486646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74447486646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81338100480).

74447486646 is an abundant number, since it is smaller than the sum of its proper divisors (88228714314).

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

74447486646 is a wasteful number, since it uses less digits than its factorization.

74447486646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34901.

The product of its digits is 86704128, while the sum is 60.

The spelling of 74447486646 in words is "seventy-four billion, four hundred forty-seven million, four hundred eighty-six thousand, six hundred forty-six".