149699554639 has 2 divisors, whose sum is σ = 149699554640. Its totient is φ = 149699554638.

The previous prime is 149699554597. The next prime is 149699554717. The reversal of 149699554639 is 936455996941.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 149699554639 - 2¹⁵ = 149699521871 is a prime.

It is a super-2 number, since 2×149699554639² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149699554439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74849777319 + 74849777320.

It is an arithmetic number, because the mean of its divisors is an integer number (74849777320).

Almost surely, 2^149699554639 is an apocalyptic number.

149699554639 is a deficient number, since it is larger than the sum of its proper divisors (1).

149699554639 is an equidigital number, since it uses as much as digits as its factorization.

149699554639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 283435200, while the sum is 70.

The spelling of 149699554639 in words is "one hundred forty-nine billion, six hundred ninety-nine million, five hundred fifty-four thousand, six hundred thirty-nine".