6451555534 has 4 divisors (see below), whose sum is σ = 9677333304. Its totient is φ = 3225777766.

The previous prime is 6451555511. The next prime is 6451555577. The reversal of 6451555534 is 4355551546.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1612888882 + ... + 1612888885.

It is an arithmetic number, because the mean of its divisors is an integer number (2419333326).

Almost surely, 2^6451555534 is an apocalyptic number.

6451555534 is a deficient number, since it is larger than the sum of its proper divisors (3225777770).

6451555534 is a wasteful number, since it uses less digits than its factorization.

6451555534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3225777769.

The product of its digits is 900000, while the sum is 43.

The square root of 6451555534 is about 80321.5757689053. The cubic root of 6451555534 is about 1861.6076144408.

The spelling of 6451555534 in words is "six billion, four hundred fifty-one million, five hundred fifty-five thousand, five hundred thirty-four".