2390545807321 has 9 divisors (see below), whose sum is σ = 2780851590399. Its totient is φ = 2049029986584.

The previous prime is 2390545807241. The next prime is 2390545807367. The reversal of 2390545807321 is 1237085450932.

The square root of 2390545807321 is 1546139.

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

It can be written as a sum of positive squares in only one way, i.e., 2232170462025 + 158375345296 = 1494045^2 + 397964^2 .

It is not a de Polignac number, because 2390545807321 - 2⁷ = 2390545807193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2390545807021) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 10712535 + ... + 10933411.

Almost surely, 2^{2390545807321} is an apocalyptic number.

2390545807321 is the 1546139-th square number.

2390545807321 is the 773070-th centered octagonal number.

It is an amenable number.

2390545807321 is a deficient number, since it is larger than the sum of its proper divisors (390305783078).

2390545807321 is an frugal number, since it uses more digits than its factorization.

2390545807321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441768 (or 220884 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 49.

Multiplying 2390545807321 by its sum of digits (49), we get a square (117136744558729 = 10822973²).

2390545807321 divided by its sum of digits (49) gives a square (48786649129 = 220877²).

The spelling of 2390545807321 in words is "two trillion, three hundred ninety billion, five hundred forty-five million, eight hundred seven thousand, three hundred twenty-one".