139415491577 has 2 divisors, whose sum is σ = 139415491578. Its totient is φ = 139415491576.

The previous prime is 139415491559. The next prime is 139415491603. The reversal of 139415491577 is 775194514931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135627212176 + 3788279401 = 368276^2 + 61549^2 .

It is a cyclic number.

It is not a de Polignac number, because 139415491577 - 2⁶ = 139415491513 is a prime.

It is not a weakly prime, because it can be changed into another prime (139415491877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69707745788 + 69707745789.

It is an arithmetic number, because the mean of its divisors is an integer number (69707745789).

Almost surely, 2^139415491577 is an apocalyptic number.

It is an amenable number.

139415491577 is a deficient number, since it is larger than the sum of its proper divisors (1).

139415491577 is an equidigital number, since it uses as much as digits as its factorization.

139415491577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4762800, while the sum is 56.

The spelling of 139415491577 in words is "one hundred thirty-nine billion, four hundred fifteen million, four hundred ninety-one thousand, five hundred seventy-seven".