40139869536 has 144 divisors (see below), whose sum is σ = 124196776704. Its totient is φ = 12223291392.

The previous prime is 40139869529. The next prime is 40139869541. The reversal of 40139869536 is 63596893104.

40139869536 is a `hidden beast` number, since 4 + 0 + 13 + 98 + 6 + 9 + 536 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×40139869536² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 307905 + ... + 418431.

It is an arithmetic number, because the mean of its divisors is an integer number (862477616).

Almost surely, 2^40139869536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40139869536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62098388352).

40139869536 is an abundant number, since it is smaller than the sum of its proper divisors (84056907168).

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

40139869536 is a wasteful number, since it uses less digits than its factorization.

40139869536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110653 (or 110642 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The spelling of 40139869536 in words is "forty billion, one hundred thirty-nine million, eight hundred sixty-nine thousand, five hundred thirty-six".