149257599691 has 2 divisors, whose sum is σ = 149257599692. Its totient is φ = 149257599690.

The previous prime is 149257599683. The next prime is 149257599703. The reversal of 149257599691 is 196995752941.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 149257599691 - 2³ = 149257599683 is a prime.

It is not a weakly prime, because it can be changed into another prime (149257599661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74628799845 + 74628799846.

It is an arithmetic number, because the mean of its divisors is an integer number (74628799846).

Almost surely, 2^149257599691 is an apocalyptic number.

149257599691 is a deficient number, since it is larger than the sum of its proper divisors (1).

149257599691 is an equidigital number, since it uses as much as digits as its factorization.

149257599691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55112400, while the sum is 67.

The spelling of 149257599691 in words is "one hundred forty-nine billion, two hundred fifty-seven million, five hundred ninety-nine thousand, six hundred ninety-one".