28042912613 has 2 divisors, whose sum is σ = 28042912614. Its totient is φ = 28042912612.

The previous prime is 28042912591. The next prime is 28042912661. The reversal of 28042912613 is 31621924082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27311859169 + 731053444 = 165263^2 + 27038^2 .

It is a cyclic number.

It is not a de Polignac number, because 28042912613 - 2³² = 23747945317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28042932613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14021456306 + 14021456307.

It is an arithmetic number, because the mean of its divisors is an integer number (14021456307).

Almost surely, 2^28042912613 is an apocalyptic number.

It is an amenable number.

28042912613 is a deficient number, since it is larger than the sum of its proper divisors (1).

28042912613 is an equidigital number, since it uses as much as digits as its factorization.

28042912613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 38.

The spelling of 28042912613 in words is "twenty-eight billion, forty-two million, nine hundred twelve thousand, six hundred thirteen".