40663156761 has 20 divisors (see below), whose sum is σ = 60760959732. Its totient is φ = 27101081088.

The previous prime is 40663156757. The next prime is 40663156763. The reversal of 40663156761 is 16765136604.

40663156761 is a `hidden beast` number, since 4 + 0 + 6 + 631 + 5 + 6 + 7 + 6 + 1 = 666.

40663156761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 7873190361 + 32789966400 = 88731^2 + 181080^2 .

It is not a de Polignac number, because 40663156761 - 2² = 40663156757 is a prime.

It is a super-2 number, since 2×40663156761² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40663156763) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 223581 + ... + 362373.

Almost surely, 2^40663156761 is an apocalyptic number.

It is an amenable number.

40663156761 is a deficient number, since it is larger than the sum of its proper divisors (20097802971).

40663156761 is a wasteful number, since it uses less digits than its factorization.

40663156761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142422 (or 142413 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The spelling of 40663156761 in words is "forty billion, six hundred sixty-three million, one hundred fifty-six thousand, seven hundred sixty-one".