149619252709 has 4 divisors (see below), whose sum is σ = 157493950240. Its totient is φ = 141744555180.

The previous prime is 149619252707. The next prime is 149619252751. The reversal of 149619252709 is 907252916941.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 149619252709 - 2¹ = 149619252707 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 149619252709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149619252701) 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 in 3 ways as a sum of consecutive naturals, for example, 3937348737 + ... + 3937348774.

It is an arithmetic number, because the mean of its divisors is an integer number (39373487560).

Almost surely, 2^149619252709 is an apocalyptic number.

149619252709 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

149619252709 is a deficient number, since it is larger than the sum of its proper divisors (7874697531).

149619252709 is an equidigital number, since it uses as much as digits as its factorization.

149619252709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7874697530.

The product of its (nonzero) digits is 2449440, while the sum is 55.

The spelling of 149619252709 in words is "one hundred forty-nine billion, six hundred nineteen million, two hundred fifty-two thousand, seven hundred nine".