244690631640 has 864 divisors, whose sum is σ = 1009049043600. Its totient is φ = 51250268160.

The previous prime is 244690631579. The next prime is 244690631677. The reversal of 244690631640 is 46136096442.

244690631640 is a `hidden beast` number, since 2 + 4 + 4 + 6 + 9 + 0 + 631 + 6 + 4 + 0 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 629024566 + ... + 629024954.

Almost surely, 2^244690631640 is an apocalyptic number.

244690631640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 244690631640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (504524521800).

244690631640 is an abundant number, since it is smaller than the sum of its proper divisors (764358411960).

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

244690631640 is a wasteful number, since it uses less digits than its factorization.

244690631640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657 (or 630 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 45.

The spelling of 244690631640 in words is "two hundred forty-four billion, six hundred ninety million, six hundred thirty-one thousand, six hundred forty".