971591362497 has 48 divisors (see below), whose sum is σ = 1636864320000. Its totient is φ = 555115389696.

The previous prime is 971591362493. The next prime is 971591362523. The reversal of 971591362497 is 794263195179.

971591362497 is a `hidden beast` number, since 9 + 7 + 1 + 5 + 9 + 136 + 2 + 497 = 666.

It is not a de Polignac number, because 971591362497 - 2² = 971591362493 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (971591362493) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26557704 + ... + 26594262.

It is an arithmetic number, because the mean of its divisors is an integer number (34101340000).

Almost surely, 2^971591362497 is an apocalyptic number.

It is an amenable number.

971591362497 is a deficient number, since it is larger than the sum of its proper divisors (665272957503).

971591362497 is a wasteful number, since it uses less digits than its factorization.

971591362497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45195 (or 45178 counting only the distinct ones).

The product of its digits is 25719120, while the sum is 63.

The spelling of 971591362497 in words is "nine hundred seventy-one billion, five hundred ninety-one million, three hundred sixty-two thousand, four hundred ninety-seven".