2491978958682 has 64 divisors (see below), whose sum is σ = 5288971742208. Its totient is φ = 781466112000.

The previous prime is 2491978958669. The next prime is 2491978958683. The reversal of 2491978958682 is 2868598791942.

It is a junction number, because it is equal to n+sod(n) for n = 2491978958598 and 2491978958607.

It is not an unprimeable number, because it can be changed into a prime (2491978958683) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1561458 + ... + 2724354.

It is an arithmetic number, because the mean of its divisors is an integer number (82640183472).

Almost surely, 2^{2491978958682} is an apocalyptic number.

2491978958682 is an abundant number, since it is smaller than the sum of its proper divisors (2796992783526).

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

2491978958682 is a wasteful number, since it uses less digits than its factorization.

2491978958682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163255.

The product of its digits is 1254113280, while the sum is 78.

The spelling of 2491978958682 in words is "two trillion, four hundred ninety-one billion, nine hundred seventy-eight million, nine hundred fifty-eight thousand, six hundred eighty-two".