740042635644 has 36 divisors (see below), whose sum is σ = 2014560509416. Its totient is φ = 227705426208.

The previous prime is 740042635637. The next prime is 740042635663. The reversal of 740042635644 is 446536240047.

740042635644 is a `hidden beast` number, since 7 + 4 + 0 + 0 + 4 + 2 + 635 + 6 + 4 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 740042635644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 790643374 + ... + 790644309.

Almost surely, 2^740042635644 is an apocalyptic number.

It is an amenable number.

740042635644 is an abundant number, since it is smaller than the sum of its proper divisors (1274517873772).

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

740042635644 is a wasteful number, since it uses less digits than its factorization.

740042635644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1581287706 (or 1581287701 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 45.

The spelling of 740042635644 in words is "seven hundred forty billion, forty-two million, six hundred thirty-five thousand, six hundred forty-four".