149245791257 has 2 divisors, whose sum is σ = 149245791258. Its totient is φ = 149245791256.

The previous prime is 149245791239. The next prime is 149245791259. The reversal of 149245791257 is 752197542941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137714467801 + 11531323456 = 371099^2 + 107384^2 .

It is a cyclic number.

It is not a de Polignac number, because 149245791257 - 2⁸ = 149245791001 is a prime.

Together with 149245791259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (149245791259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74622895628 + 74622895629.

It is an arithmetic number, because the mean of its divisors is an integer number (74622895629).

Almost surely, 2^149245791257 is an apocalyptic number.

It is an amenable number.

149245791257 is a deficient number, since it is larger than the sum of its proper divisors (1).

149245791257 is an equidigital number, since it uses as much as digits as its factorization.

149245791257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6350400, while the sum is 56.

The spelling of 149245791257 in words is "one hundred forty-nine billion, two hundred forty-five million, seven hundred ninety-one thousand, two hundred fifty-seven".