4525454321621 has 4 divisors (see below), whose sum is σ = 4525966317600. Its totient is φ = 4524942325644.

The previous prime is 4525454321617. The next prime is 4525454321653. The reversal of 4525454321621 is 1261234545254.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4525454321621 - 2² = 4525454321617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4525454321611) 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, 255984731 + ... + 256002408.

It is an arithmetic number, because the mean of its divisors is an integer number (1131491579400).

Almost surely, 2^{4525454321621} is an apocalyptic number.

It is an amenable number.

4525454321621 is a deficient number, since it is larger than the sum of its proper divisors (511995979).

4525454321621 is an equidigital number, since it uses as much as digits as its factorization.

4525454321621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511995978.

The product of its digits is 1152000, while the sum is 44.

Adding to 4525454321621 its reverse (1261234545254), we get a palindrome (5786688866875).

The spelling of 4525454321621 in words is "four trillion, five hundred twenty-five billion, four hundred fifty-four million, three hundred twenty-one thousand, six hundred twenty-one".