2646265386540 has 48 divisors (see below), whose sum is σ = 7409614447872. Its totient is φ = 705663973056.

The previous prime is 2646265386509. The next prime is 2646265386547. The reversal of 2646265386540 is 456835626462.

It is a super-2 number, since 2×2646265386540² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2646265386547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10716747 + ... + 10960893.

It is an arithmetic number, because the mean of its divisors is an integer number (154366967664).

Almost surely, 2^{2646265386540} is an apocalyptic number.

2646265386540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2646265386540 is an abundant number, since it is smaller than the sum of its proper divisors (4763349061332).

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

2646265386540 is a wasteful number, since it uses less digits than its factorization.

2646265386540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424806 (or 424804 counting only the distinct ones).

The product of its (nonzero) digits is 49766400, while the sum is 57.

The spelling of 2646265386540 in words is "two trillion, six hundred forty-six billion, two hundred sixty-five million, three hundred eighty-six thousand, five hundred forty".