2491728431598 has 48 divisors (see below), whose sum is σ = 6188634781056. Its totient is φ = 709771574160.

The previous prime is 2491728431587. The next prime is 2491728431609. The reversal of 2491728431598 is 8951348271942.

2491728431598 is a `hidden beast` number, since 2 + 4 + 9 + 1 + 7 + 2 + 8 + 4 + 31 + 598 = 666.

It is an interprime number because it is at equal distance from previous prime (2491728431587) and next prime (2491728431609).

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

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 23 ways as a sum of consecutive naturals, for example, 29830836 + ... + 29914247.

It is an arithmetic number, because the mean of its divisors is an integer number (128929891272).

Almost surely, 2^{2491728431598} is an apocalyptic number.

2491728431598 is an abundant number, since it is smaller than the sum of its proper divisors (3696906349458).

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

2491728431598 is a wasteful number, since it uses less digits than its factorization.

2491728431598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59745429 (or 59745426 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 63.

The spelling of 2491728431598 in words is "two trillion, four hundred ninety-one billion, seven hundred twenty-eight million, four hundred thirty-one thousand, five hundred ninety-eight".