6451770155 has 4 divisors (see below), whose sum is σ = 7742124192. Its totient is φ = 5161416120.

The previous prime is 6451770151. The next prime is 6451770161. The reversal of 6451770155 is 5510771546.

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

It is not a de Polignac number, because 6451770155 - 2² = 6451770151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6451770151) 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, 645177011 + ... + 645177020.

It is an arithmetic number, because the mean of its divisors is an integer number (1935531048).

Almost surely, 2^6451770155 is an apocalyptic number.

6451770155 is a deficient number, since it is larger than the sum of its proper divisors (1290354037).

6451770155 is a wasteful number, since it uses less digits than its factorization.

6451770155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290354036.

The product of its (nonzero) digits is 147000, while the sum is 41.

The square root of 6451770155 is about 80322.9117686853. The cubic root of 6451770155 is about 1861.6282573000.

The spelling of 6451770155 in words is "six billion, four hundred fifty-one million, seven hundred seventy thousand, one hundred fifty-five".