40007420657 has 2 divisors, whose sum is σ = 40007420658. Its totient is φ = 40007420656.

The previous prime is 40007420653. The next prime is 40007420689. The reversal of 40007420657 is 75602470004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24259931536 + 15747489121 = 155756^2 + 125489^2 .

It is a cyclic number.

It is not a de Polignac number, because 40007420657 - 2² = 40007420653 is a prime.

It is not a weakly prime, because it can be changed into another prime (40007420653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20003710328 + 20003710329.

It is an arithmetic number, because the mean of its divisors is an integer number (20003710329).

Almost surely, 2^40007420657 is an apocalyptic number.

It is an amenable number.

40007420657 is a deficient number, since it is larger than the sum of its proper divisors (1).

40007420657 is an equidigital number, since it uses as much as digits as its factorization.

40007420657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47040, while the sum is 35.

The spelling of 40007420657 in words is "forty billion, seven million, four hundred twenty thousand, six hundred fifty-seven".