2621538649296 has 640 divisors, whose sum is σ = 9342002073600. Its totient is φ = 687144591360.

The previous prime is 2621538649283. The next prime is 2621538649307. The reversal of 2621538649296 is 6929468351262.

It is a happy number.

2621538649296 is a `hidden beast` number, since 2 + 6 + 2 + 1 + 53 + 8 + 6 + 492 + 96 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

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 127 ways as a sum of consecutive naturals, for example, 322726291 + ... + 322734413.

It is an arithmetic number, because the mean of its divisors is an integer number (14596878240).

Almost surely, 2^{2621538649296} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2621538649296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4671001036800).

2621538649296 is an abundant number, since it is smaller than the sum of its proper divisors (6720463424304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2621538649296 is a wasteful number, since it uses less digits than its factorization.

2621538649296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8344 (or 8332 counting only the distinct ones).

The product of its digits is 67184640, while the sum is 63.

The spelling of 2621538649296 in words is "two trillion, six hundred twenty-one billion, five hundred thirty-eight million, six hundred forty-nine thousand, two hundred ninety-six".