40199179392 has 128 divisors (see below), whose sum is σ = 119168395200. Its totient is φ = 13340436480.

The previous prime is 40199179373. The next prime is 40199179393. The reversal of 40199179392 is 29397199104.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-3 number, since 3×40199179392³ (a number of 33 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (40199179393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 758892 + ... + 810132.

Almost surely, 2^40199179392 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 40199179392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59584197600).

40199179392 is an abundant number, since it is smaller than the sum of its proper divisors (78969215808).

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

40199179392 is a wasteful number, since it uses less digits than its factorization.

40199179392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51491 (or 51473 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 54.

The spelling of 40199179392 in words is "forty billion, one hundred ninety-nine million, one hundred seventy-nine thousand, three hundred ninety-two".