6501456939451 has 4 divisors (see below), whose sum is σ = 6502080112632. Its totient is φ = 6500833766272.

The previous prime is 6501456939409. The next prime is 6501456939499. The reversal of 6501456939451 is 1549396541056.

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 6501456939451 - 2⁷ = 6501456939323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6501456939851) 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, 311570941 + ... + 311591806.

It is an arithmetic number, because the mean of its divisors is an integer number (1625520028158).

Almost surely, 2^{6501456939451} is an apocalyptic number.

6501456939451 is a deficient number, since it is larger than the sum of its proper divisors (623173181).

6501456939451 is a wasteful number, since it uses less digits than its factorization.

6501456939451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623173180.

The product of its (nonzero) digits is 17496000, while the sum is 58.

The spelling of 6501456939451 in words is "six trillion, five hundred one billion, four hundred fifty-six million, nine hundred thirty-nine thousand, four hundred fifty-one".