40645917699 has 16 divisors (see below), whose sum is σ = 56556153600. Its totient is φ = 25916701536.

The previous prime is 40645917679. The next prime is 40645917721. The reversal of 40645917699 is 99671954604.

It is not a de Polignac number, because 40645917699 - 2⁸ = 40645917443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40645917619) 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, 972372 + ... + 1013310.

It is an arithmetic number, because the mean of its divisors is an integer number (3534759600).

Almost surely, 2^40645917699 is an apocalyptic number.

40645917699 is a deficient number, since it is larger than the sum of its proper divisors (15910235901).

40645917699 is a wasteful number, since it uses less digits than its factorization.

40645917699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55354.

The product of its (nonzero) digits is 14696640, while the sum is 60.

The spelling of 40645917699 in words is "forty billion, six hundred forty-five million, nine hundred seventeen thousand, six hundred ninety-nine".