2645052251531 has 4 divisors (see below), whose sum is σ = 2659665800064. Its totient is φ = 2630438703000.

The previous prime is 2645052251503. The next prime is 2645052251539. The reversal of 2645052251531 is 1351522505462.

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 2645052251531 - 2³⁴ = 2627872382347 is a prime.

It is a super-2 number, since 2×2645052251531² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2645052251539) 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, 7306773995 + ... + 7306774356.

It is an arithmetic number, because the mean of its divisors is an integer number (664916450016).

Almost surely, 2^{2645052251531} is an apocalyptic number.

2645052251531 is a deficient number, since it is larger than the sum of its proper divisors (14613548533).

2645052251531 is a wasteful number, since it uses less digits than its factorization.

2645052251531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14613548532.

The product of its (nonzero) digits is 360000, while the sum is 41.

Adding to 2645052251531 its reverse (1351522505462), we get a palindrome (3996574756993).

The spelling of 2645052251531 in words is "two trillion, six hundred forty-five billion, fifty-two million, two hundred fifty-one thousand, five hundred thirty-one".