2491475632128 has 672 divisors, whose sum is σ = 8884094601600. Its totient is φ = 687216918528.

The previous prime is 2491475632117. The next prime is 2491475632171. The reversal of 2491475632128 is 8212365741942.

It is a happy number.

2491475632128 is a `hidden beast` number, since 2 + 4 + 91 + 475 + 63 + 2 + 1 + 28 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 314298501 + ... + 314306427.

Almost surely, 2^{2491475632128} is an apocalyptic number.

2491475632128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2491475632128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4442047300800).

2491475632128 is an abundant number, since it is smaller than the sum of its proper divisors (6392618969472).

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

2491475632128 is an equidigital number, since it uses as much as digits as its factorization.

2491475632128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8005 (or 7968 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The spelling of 2491475632128 in words is "two trillion, four hundred ninety-one billion, four hundred seventy-five million, six hundred thirty-two thousand, one hundred twenty-eight".