6451722271546 has 4 divisors (see below), whose sum is σ = 9677583407322. Its totient is φ = 3225861135772.

The previous prime is 6451722271543. The next prime is 6451722271559.

6451722271546 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in only one way, i.e., 4257161497521 + 2194560774025 = 2063289^2 + 1481405^2 .

It is a super-2 number, since 2×6451722271546² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6451722271493 and 6451722271502.

It is not an unprimeable number, because it can be changed into a prime (6451722271543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1612930567885 + ... + 1612930567888.

Almost surely, 2^{6451722271546} is an apocalyptic number.

6451722271546 is a deficient number, since it is larger than the sum of its proper divisors (3225861135776).

6451722271546 is a wasteful number, since it uses less digits than its factorization.

6451722271546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3225861135775.

The product of its digits is 5644800, while the sum is 52.

The spelling of 6451722271546 in words is "six trillion, four hundred fifty-one billion, seven hundred twenty-two million, two hundred seventy-one thousand, five hundred forty-six".