40073691915 has 24 divisors (see below), whose sum is σ = 73547012448. Its totient is φ = 20115421440.

The previous prime is 40073691877. The next prime is 40073691947. The reversal of 40073691915 is 51919637004.

40073691915 is a `hidden beast` number, since 400 + 73 + 6 + 91 + 91 + 5 = 666.

It is not a de Polignac number, because 40073691915 - 2¹¹ = 40073689867 is a prime.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26191191 + ... + 26192720.

It is an arithmetic number, because the mean of its divisors is an integer number (3064458852).

Almost surely, 2^40073691915 is an apocalyptic number.

40073691915 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

40073691915 is a deficient number, since it is larger than the sum of its proper divisors (33473320533).

40073691915 is a wasteful number, since it uses less digits than its factorization.

40073691915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52383939 (or 52383936 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The spelling of 40073691915 in words is "forty billion, seventy-three million, six hundred ninety-one thousand, nine hundred fifteen".