40860978669 has 12 divisors (see below), whose sum is σ = 67453044256. Its totient is φ = 23349130632.

The previous prime is 40860978629. The next prime is 40860978671. The reversal of 40860978669 is 96687906804.

40860978669 is a `hidden beast` number, since 408 + 6 + 0 + 97 + 86 + 69 = 666.

It is not a de Polignac number, because 40860978669 - 2¹¹ = 40860976621 is a prime.

It is a super-2 number, since 2×40860978669² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63), and also a Moran number because the ratio is a prime number: 648586963 = 40860978669 / (4 + 0 + 8 + 6 + 0 + 9 + 7 + 8 + 6 + 6 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40860978619) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 324293419 + ... + 324293544.

Almost surely, 2^40860978669 is an apocalyptic number.

It is an amenable number.

40860978669 is a deficient number, since it is larger than the sum of its proper divisors (26592065587).

40860978669 is a wasteful number, since it uses less digits than its factorization.

40860978669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648586976 (or 648586973 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 63.

The spelling of 40860978669 in words is "forty billion, eight hundred sixty million, nine hundred seventy-eight thousand, six hundred sixty-nine".