155207042665 has 8 divisors (see below), whose sum is σ = 186847322688. Its totient is φ = 123766386480.

The previous prime is 155207042659. The next prime is 155207042671. The reversal of 155207042665 is 566240702551.

It is an interprime number because it is at equal distance from previous prime (155207042659) and next prime (155207042671).

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

It is not a de Polignac number, because 155207042665 - 2⁷ = 155207042537 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49904247 + ... + 49907356.

It is an arithmetic number, because the mean of its divisors is an integer number (23355915336).

Almost surely, 2^155207042665 is an apocalyptic number.

It is an amenable number.

155207042665 is a deficient number, since it is larger than the sum of its proper divisors (31640280023).

155207042665 is an equidigital number, since it uses as much as digits as its factorization.

155207042665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99811919.

The product of its (nonzero) digits is 504000, while the sum is 43.

The spelling of 155207042665 in words is "one hundred fifty-five billion, two hundred seven million, forty-two thousand, six hundred sixty-five".