97866019525 has 12 divisors (see below), whose sum is σ = 121969879812. Its totient is φ = 77895386240.

The previous prime is 97866019519. The next prime is 97866019529. The reversal of 97866019525 is 52591066879.

It can be written as a sum of positive squares in 6 ways, for example, as 542610436 + 97323409089 = 23294^2 + 311967^2 .

It is not a de Polignac number, because 97866019525 - 2¹⁹ = 97865495237 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 97866019525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97866019529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9930712 + ... + 9940561.

It is an arithmetic number, because the mean of its divisors is an integer number (10164156651).

Almost surely, 2^97866019525 is an apocalyptic number.

It is an amenable number.

97866019525 is a deficient number, since it is larger than the sum of its proper divisors (24103860287).

97866019525 is a wasteful number, since it uses less digits than its factorization.

97866019525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19871480 (or 19871475 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 58.

The spelling of 97866019525 in words is "ninety-seven billion, eight hundred sixty-six million, nineteen thousand, five hundred twenty-five".