40512613397 has 2 divisors, whose sum is σ = 40512613398. Its totient is φ = 40512613396.

The previous prime is 40512613387. The next prime is 40512613417. The reversal of 40512613397 is 79331621504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37832584036 + 2680029361 = 194506^2 + 51769^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40512613397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40512613387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20256306698 + 20256306699.

It is an arithmetic number, because the mean of its divisors is an integer number (20256306699).

Almost surely, 2^40512613397 is an apocalyptic number.

It is an amenable number.

40512613397 is a deficient number, since it is larger than the sum of its proper divisors (1).

40512613397 is an equidigital number, since it uses as much as digits as its factorization.

40512613397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 41.

The spelling of 40512613397 in words is "forty billion, five hundred twelve million, six hundred thirteen thousand, three hundred ninety-seven".