40139695344 has 120 divisors (see below), whose sum is σ = 120711940608. Its totient is φ = 11460113280.

The previous prime is 40139695339. The next prime is 40139695399. The reversal of 40139695344 is 44359693104.

It is a super-2 number, since 2×40139695344² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 40139695293 and 40139695302.

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, 3680139 + ... + 3691029.

Almost surely, 2^40139695344 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 40139695344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60355970304).

40139695344 is an abundant number, since it is smaller than the sum of its proper divisors (80572245264).

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

40139695344 is a wasteful number, since it uses less digits than its factorization.

40139695344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12483 (or 12470 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 48.

The spelling of 40139695344 in words is "forty billion, one hundred thirty-nine million, six hundred ninety-five thousand, three hundred forty-four".