40257278137 has 2 divisors, whose sum is σ = 40257278138. Its totient is φ = 40257278136.

The previous prime is 40257278129. The next prime is 40257278197. The reversal of 40257278137 is 73187275204.

40257278137 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., 25690960656 + 14566317481 = 160284^2 + 120691^2 .

It is a cyclic number.

It is not a de Polignac number, because 40257278137 - 2³ = 40257278129 is a prime.

It is not a weakly prime, because it can be changed into another prime (40257278197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20128639068 + 20128639069.

It is an arithmetic number, because the mean of its divisors is an integer number (20128639069).

Almost surely, 2^40257278137 is an apocalyptic number.

It is an amenable number.

40257278137 is a deficient number, since it is larger than the sum of its proper divisors (1).

40257278137 is an equidigital number, since it uses as much as digits as its factorization.

40257278137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 658560, while the sum is 46.

The spelling of 40257278137 in words is "forty billion, two hundred fifty-seven million, two hundred seventy-eight thousand, one hundred thirty-seven".