7902345054321 has 81 divisors (see below), whose sum is σ = 11931553123659. Its totient is φ = 5039759800800.

The previous prime is 7902345054299. The next prime is 7902345054347. The reversal of 7902345054321 is 1234505432097.

It is a happy number.

The square root of 7902345054321 is 2811111.

It is a perfect power (a square), and thus also a powerful number.

7902345054321 is a `hidden beast` number, since 7 + 9 + 0 + 2 + 34 + 50 + 543 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 87077517921 + 7815267536400 = 295089^2 + 2795580^2 .

It is not a de Polignac number, because 7902345054321 - 2¹³ = 7902345046129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7902345054361) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 43659364851 + ... + 43659365031.

Almost surely, 2^{7902345054321} is an apocalyptic number.

7902345054321 is the 2811111-st square number.

7902345054321 is the 1405556-th centered octagonal number.

It is an amenable number.

7902345054321 is a deficient number, since it is larger than the sum of its proper divisors (4029208069338).

7902345054321 is an equidigital number, since it uses as much as digits as its factorization.

7902345054321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The spelling of 7902345054321 in words is "seven trillion, nine hundred two billion, three hundred forty-five million, fifty-four thousand, three hundred twenty-one".