2542131643646 has 64 divisors (see below), whose sum is σ = 4502714033664. Its totient is φ = 1054046822400.

The previous prime is 2542131643637. The next prime is 2542131643673. The reversal of 2542131643646 is 6463461312452.

It is a self number, because there is not a number n which added to its sum of digits gives 2542131643646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11812526 + ... + 12025806.

It is an arithmetic number, because the mean of its divisors is an integer number (70354906776).

Almost surely, 2^{2542131643646} is an apocalyptic number.

2542131643646 is a deficient number, since it is larger than the sum of its proper divisors (1960582390018).

2542131643646 is a wasteful number, since it uses less digits than its factorization.

2542131643646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213585.

The product of its digits is 2488320, while the sum is 47.

The spelling of 2542131643646 in words is "two trillion, five hundred forty-two billion, one hundred thirty-one million, six hundred forty-three thousand, six hundred forty-six".