40148392457 has 2 divisors, whose sum is σ = 40148392458. Its totient is φ = 40148392456.

The previous prime is 40148392451. The next prime is 40148392589. The reversal of 40148392457 is 75429384104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38760159376 + 1388233081 = 196876^2 + 37259^2 .

It is a cyclic number.

It is not a de Polignac number, because 40148392457 - 2¹⁰ = 40148391433 is a prime.

It is a super-2 number, since 2×40148392457² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40148392451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20074196228 + 20074196229.

It is an arithmetic number, because the mean of its divisors is an integer number (20074196229).

Almost surely, 2^40148392457 is an apocalyptic number.

It is an amenable number.

40148392457 is a deficient number, since it is larger than the sum of its proper divisors (1).

40148392457 is an equidigital number, since it uses as much as digits as its factorization.

40148392457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 40148392457 in words is "forty billion, one hundred forty-eight million, three hundred ninety-two thousand, four hundred fifty-seven".