149699554717 has 2 divisors, whose sum is σ = 149699554718. Its totient is φ = 149699554716.

The previous prime is 149699554639. The next prime is 149699554733. The reversal of 149699554717 is 717455996941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125206991716 + 24492563001 = 353846^2 + 156501^2 .

It is a cyclic number.

It is not a de Polignac number, because 149699554717 - 2²³ = 149691166109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149699554747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74849777358 + 74849777359.

It is an arithmetic number, because the mean of its divisors is an integer number (74849777359).

Almost surely, 2^149699554717 is an apocalyptic number.

It is an amenable number.

149699554717 is a deficient number, since it is larger than the sum of its proper divisors (1).

149699554717 is an equidigital number, since it uses as much as digits as its factorization.

149699554717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 85730400, while the sum is 67.

The spelling of 149699554717 in words is "one hundred forty-nine billion, six hundred ninety-nine million, five hundred fifty-four thousand, seven hundred seventeen".