40399652634 has 16 divisors (see below), whose sum is σ = 88144696800. Its totient is φ = 12242318960.

The previous prime is 40399652603. The next prime is 40399652647. The reversal of 40399652634 is 43625699304.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306057909 + ... + 306058040.

It is an arithmetic number, because the mean of its divisors is an integer number (5509043550).

Almost surely, 2^40399652634 is an apocalyptic number.

40399652634 is an abundant number, since it is smaller than the sum of its proper divisors (47745044166).

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

40399652634 is a wasteful number, since it uses less digits than its factorization.

40399652634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612115965.

The product of its (nonzero) digits is 4199040, while the sum is 51.

The spelling of 40399652634 in words is "forty billion, three hundred ninety-nine million, six hundred fifty-two thousand, six hundred thirty-four".