40193693145 has 24 divisors (see below), whose sum is σ = 69675792576. Its totient is φ = 21434567328.

The previous prime is 40193693123. The next prime is 40193693149. The reversal of 40193693145 is 54139639104.

It is not a de Polignac number, because 40193693145 - 2²² = 40189498841 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 40193693145.

It is not an unprimeable number, because it can be changed into a prime (40193693149) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 504852 + ... + 579018.

It is an arithmetic number, because the mean of its divisors is an integer number (2903158024).

Almost surely, 2^40193693145 is an apocalyptic number.

40193693145 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40193693145 is a deficient number, since it is larger than the sum of its proper divisors (29482099431).

40193693145 is a wasteful number, since it uses less digits than its factorization.

40193693145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86221 (or 86218 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 40193693145 in words is "forty billion, one hundred ninety-three million, six hundred ninety-three thousand, one hundred forty-five".