40157534381 has 2 divisors, whose sum is σ = 40157534382. Its totient is φ = 40157534380.

The previous prime is 40157534377. The next prime is 40157534401. The reversal of 40157534381 is 18343575104.

40157534381 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., 39376052356 + 781482025 = 198434^2 + 27955^2 .

It is a cyclic number.

It is not a de Polignac number, because 40157534381 - 2² = 40157534377 is a prime.

It is a super-2 number, since 2×40157534381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40157534371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20078767190 + 20078767191.

It is an arithmetic number, because the mean of its divisors is an integer number (20078767191).

Almost surely, 2^40157534381 is an apocalyptic number.

It is an amenable number.

40157534381 is a deficient number, since it is larger than the sum of its proper divisors (1).

40157534381 is an equidigital number, since it uses as much as digits as its factorization.

40157534381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 201600, while the sum is 41.

The spelling of 40157534381 in words is "forty billion, one hundred fifty-seven million, five hundred thirty-four thousand, three hundred eighty-one".