155056000661 has 8 divisors (see below), whose sum is σ = 156438898560. Its totient is φ = 153673291072.

The previous prime is 155056000651. The next prime is 155056000667. The reversal of 155056000661 is 166000650551.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155056000661 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 (155056000667) 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 7 ways as a sum of consecutive naturals, for example, 2002676 + ... + 2078658.

It is an arithmetic number, because the mean of its divisors is an integer number (19554862320).

Almost surely, 2^155056000661 is an apocalyptic number.

It is an amenable number.

155056000661 is a deficient number, since it is larger than the sum of its proper divisors (1382897899).

155056000661 is a wasteful number, since it uses less digits than its factorization.

155056000661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94155.

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 155056000661 in words is "one hundred fifty-five billion, fifty-six million, six hundred sixty-one", and thus it is an aban number.