2645196789690 has 480 divisors, whose sum is σ = 8887906849536. Its totient is φ = 552668313600.

The previous prime is 2645196789689. The next prime is 2645196789701. The reversal of 2645196789690 is 969876915462.

2645196789690 is a `hidden beast` number, since 2 + 6 + 451 + 9 + 6 + 7 + 89 + 6 + 90 = 666.

It is a super-2 number, since 2×2645196789690² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 98684290 + ... + 98711090.

Almost surely, 2^{2645196789690} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2645196789690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4443953424768).

2645196789690 is an abundant number, since it is smaller than the sum of its proper divisors (6242710059846).

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

2645196789690 is a wasteful number, since it uses less digits than its factorization.

2645196789690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26956 (or 26934 counting only the distinct ones).

The product of its (nonzero) digits is 352719360, while the sum is 72.

The spelling of 2645196789690 in words is "two trillion, six hundred forty-five billion, one hundred ninety-six million, seven hundred eighty-nine thousand, six hundred ninety".