40634436654 has 96 divisors (see below), whose sum is σ = 103336197120. Its totient is φ = 11299046976.

The previous prime is 40634436641. The next prime is 40634436719. The reversal of 40634436654 is 45663443604.

40634436654 is a `hidden beast` number, since 4 + 0 + 634 + 4 + 3 + 6 + 6 + 5 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1040872 + ... + 1079204.

It is an arithmetic number, because the mean of its divisors is an integer number (1076418720).

Almost surely, 2^40634436654 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40634436654, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51668098560).

40634436654 is an abundant number, since it is smaller than the sum of its proper divisors (62701760466).

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

40634436654 is a wasteful number, since it uses less digits than its factorization.

40634436654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38574 (or 38571 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 45.

The spelling of 40634436654 in words is "forty billion, six hundred thirty-four million, four hundred thirty-six thousand, six hundred fifty-four".