6155696891 has 4 divisors (see below), whose sum is σ = 6247573032. Its totient is φ = 6063820752.

The previous prime is 6155696887. The next prime is 6155696903. The reversal of 6155696891 is 1986965516.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6155696891 - 2² = 6155696887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6155696801) 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, 45937970 + ... + 45938103.

It is an arithmetic number, because the mean of its divisors is an integer number (1561893258).

Almost surely, 2^6155696891 is an apocalyptic number.

6155696891 is a deficient number, since it is larger than the sum of its proper divisors (91876141).

6155696891 is an equidigital number, since it uses as much as digits as its factorization.

6155696891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91876140.

The product of its digits is 3499200, while the sum is 56.

The square root of 6155696891 is about 78458.2493495745. The cubic root of 6155696891 is about 1832.7043427467.

The spelling of 6155696891 in words is "six billion, one hundred fifty-five million, six hundred ninety-six thousand, eight hundred ninety-one".