97581949775 has 6 divisors (see below), whose sum is σ = 121001617752. Its totient is φ = 78065559800.

The previous prime is 97581949757. The next prime is 97581949793. The reversal of 97581949775 is 57794918579.

It is an interprime number because it is at equal distance from previous prime (97581949757) and next prime (97581949793).

It is not a de Polignac number, because 97581949775 - 2²⁴ = 97565172559 is a prime.

It is a super-3 number, since 3×97581949775³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 97581949699 and 97581949708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1951638971 + ... + 1951639020.

It is an arithmetic number, because the mean of its divisors is an integer number (20166936292).

Almost surely, 2^97581949775 is an apocalyptic number.

97581949775 is a deficient number, since it is larger than the sum of its proper divisors (23419667977).

97581949775 is a wasteful number, since it uses less digits than its factorization.

97581949775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3903278001 (or 3903277996 counting only the distinct ones).

The product of its digits is 200037600, while the sum is 71.

The spelling of 97581949775 in words is "ninety-seven billion, five hundred eighty-one million, nine hundred forty-nine thousand, seven hundred seventy-five".