2521263778495 has 64 divisors (see below), whose sum is σ = 3977490816000. Its totient is φ = 1486392975360.

The previous prime is 2521263778387. The next prime is 2521263778511. The reversal of 2521263778495 is 5948773621252.

It is a happy number.

It is not a de Polignac number, because 2521263778495 - 2¹⁹ = 2521263254207 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3922081 + ... + 4519429.

It is an arithmetic number, because the mean of its divisors is an integer number (62148294000).

Almost surely, 2^{2521263778495} is an apocalyptic number.

2521263778495 is a deficient number, since it is larger than the sum of its proper divisors (1456227037505).

2521263778495 is a wasteful number, since it uses less digits than its factorization.

2521263778495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597968.

The product of its digits is 50803200, while the sum is 61.

The spelling of 2521263778495 in words is "two trillion, five hundred twenty-one billion, two hundred sixty-three million, seven hundred seventy-eight thousand, four hundred ninety-five".