40518897651 has 16 divisors (see below), whose sum is σ = 60034585600. Its totient is φ = 27009633384.

The previous prime is 40518897619. The next prime is 40518897667. The reversal of 40518897651 is 15679881504.

It is a happy number.

40518897651 is a `hidden beast` number, since 4 + 0 + 518 + 8 + 9 + 76 + 51 = 666.

It is not a de Polignac number, because 40518897651 - 2⁵ = 40518897619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40518897751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183810 + ... + 338856.

It is an arithmetic number, because the mean of its divisors is an integer number (3752161600).

Almost surely, 2^40518897651 is an apocalyptic number.

40518897651 is a deficient number, since it is larger than the sum of its proper divisors (19515687949).

40518897651 is a wasteful number, since it uses less digits than its factorization.

40518897651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164735 (or 164729 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 54.

The spelling of 40518897651 in words is "forty billion, five hundred eighteen million, eight hundred ninety-seven thousand, six hundred fifty-one".