6155264721 has 8 divisors (see below), whose sum is σ = 8213002560. Its totient is φ = 4100518352.

The previous prime is 6155264707. The next prime is 6155264729. The reversal of 6155264721 is 1274625516.

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 6155264721 - 2²² = 6151070417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6155264721.

It is not an unprimeable number, because it can be changed into a prime (6155264729) 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, 743061 + ... + 751298.

It is an arithmetic number, because the mean of its divisors is an integer number (1026625320).

Almost surely, 2^6155264721 is an apocalyptic number.

It is an amenable number.

6155264721 is a deficient number, since it is larger than the sum of its proper divisors (2057737839).

6155264721 is a wasteful number, since it uses less digits than its factorization.

6155264721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495735.

The product of its digits is 100800, while the sum is 39.

The square root of 6155264721 is about 78455.4951612696. The cubic root of 6155264721 is about 1832.6614524839.

The spelling of 6155264721 in words is "six billion, one hundred fifty-five million, two hundred sixty-four thousand, seven hundred twenty-one".