6531453423078 has 128 divisors (see below), whose sum is σ = 14520484113408. Its totient is φ = 1948101771264.

The previous prime is 6531453423031. The next prime is 6531453423109. The reversal of 6531453423078 is 8703243541356.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 6531453423078.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 281552976 + ... + 281576172.

It is an arithmetic number, because the mean of its divisors is an integer number (113441282136).

Almost surely, 2^{6531453423078} is an apocalyptic number.

6531453423078 is an abundant number, since it is smaller than the sum of its proper divisors (7989030690330).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6531453423078 is a wasteful number, since it uses less digits than its factorization.

6531453423078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23966.

The product of its (nonzero) digits is 7257600, while the sum is 51.

The spelling of 6531453423078 in words is "six trillion, five hundred thirty-one billion, four hundred fifty-three million, four hundred twenty-three thousand, seventy-eight".