40015512501421 has 2 divisors, whose sum is σ = 40015512501422. Its totient is φ = 40015512501420.

The previous prime is 40015512501347. The next prime is 40015512501521. The reversal of 40015512501421 is 12410521551004.

40015512501421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31732547917225 + 8282964584196 = 5633165^2 + 2878014^2 .

It is a cyclic number.

It is not a de Polignac number, because 40015512501421 - 2³⁵ = 39981152763053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40015512501521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20007756250710 + 20007756250711.

It is an arithmetic number, because the mean of its divisors is an integer number (20007756250711).

Almost surely, 2^{40015512501421} is an apocalyptic number.

It is an amenable number.

40015512501421 is a deficient number, since it is larger than the sum of its proper divisors (1).

40015512501421 is an equidigital number, since it uses as much as digits as its factorization.

40015512501421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8000, while the sum is 31.

The spelling of 40015512501421 in words is "forty trillion, fifteen billion, five hundred twelve million, five hundred one thousand, four hundred twenty-one".