155614661 has 4 divisors (see below), whose sum is σ = 155645952. Its totient is φ = 155583372.

The previous prime is 155614649. The next prime is 155614687. The reversal of 155614661 is 166416551.

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 155614661 - 2⁶ = 155614597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155614621) 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, 6341 + ... + 18746.

It is an arithmetic number, because the mean of its divisors is an integer number (38911488).

Almost surely, 2^155614661 is an apocalyptic number.

It is an amenable number.

155614661 is a deficient number, since it is larger than the sum of its proper divisors (31291).

155614661 is an equidigital number, since it uses as much as digits as its factorization.

155614661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31290.

The product of its digits is 21600, while the sum is 35.

The square root of 155614661 is about 12474.5605533822. The cubic root of 155614661 is about 537.8776560618.

The spelling of 155614661 in words is "one hundred fifty-five million, six hundred fourteen thousand, six hundred sixty-one".