155949406609 has 8 divisors (see below), whose sum is σ = 164222752320. Its totient is φ = 147800472336.

The previous prime is 155949406597. The next prime is 155949406643. The reversal of 155949406609 is 906604949551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155949406609 - 2⁹ = 155949406097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155949406699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31100287 + ... + 31105300.

It is an arithmetic number, because the mean of its divisors is an integer number (20527844040).

Almost surely, 2^155949406609 is an apocalyptic number.

It is an amenable number.

155949406609 is a deficient number, since it is larger than the sum of its proper divisors (8273345711).

155949406609 is a wasteful number, since it uses less digits than its factorization.

155949406609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62205719.

The product of its (nonzero) digits is 10497600, while the sum is 58.

The spelling of 155949406609 in words is "one hundred fifty-five billion, nine hundred forty-nine million, four hundred six thousand, six hundred nine".