491597487600 has 120 divisors (see below), whose sum is σ = 1581285783792. Its totient is φ = 130548633600.

The previous prime is 491597487599. The next prime is 491597487631. The reversal of 491597487600 is 6784795194.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 560727 + ... + 1139126.

Almost surely, 2^491597487600 is an apocalyptic number.

491597487600 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

491597487600 is an abundant number, since it is smaller than the sum of its proper divisors (1089688296192).

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

491597487600 is a wasteful number, since it uses less digits than its factorization.

491597487600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700115 (or 1700104 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 60.

The spelling of 491597487600 in words is "four hundred ninety-one billion, five hundred ninety-seven million, four hundred eighty-seven thousand, six hundred".