149446765397 has 4 divisors (see below), whose sum is σ = 150272438316. Its totient is φ = 148621092480.

The previous prime is 149446765381. The next prime is 149446765441. The reversal of 149446765397 is 793567644941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 793567644941 = 1201 ⋅660755741.

It can be written as a sum of positive squares in 2 ways, for example, as 4505899876 + 144940865521 = 67126^2 + 380711^2 .

It is a cyclic number.

It is not a de Polignac number, because 149446765397 - 2⁴ = 149446765381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149446765367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 412836188 + ... + 412836549.

It is an arithmetic number, because the mean of its divisors is an integer number (37568109579).

Almost surely, 2^149446765397 is an apocalyptic number.

It is an amenable number.

149446765397 is a deficient number, since it is larger than the sum of its proper divisors (825672919).

149446765397 is an equidigital number, since it uses as much as digits as its factorization.

149446765397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825672918.

The product of its digits is 137168640, while the sum is 65.

The spelling of 149446765397 in words is "one hundred forty-nine billion, four hundred forty-six million, seven hundred sixty-five thousand, three hundred ninety-seven".