97188251961 has 4 divisors (see below), whose sum is σ = 129584335952. Its totient is φ = 64792167972.

The previous prime is 97188251947. The next prime is 97188251977. The reversal of 97188251961 is 16915288179.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 97188251961 - 2¹⁴ = 97188235577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97188251921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16198041991 + ... + 16198041996.

It is an arithmetic number, because the mean of its divisors is an integer number (32396083988).

Almost surely, 2^97188251961 is an apocalyptic number.

It is an amenable number.

97188251961 is a deficient number, since it is larger than the sum of its proper divisors (32396083991).

97188251961 is a wasteful number, since it uses less digits than its factorization.

97188251961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32396083990.

The product of its digits is 2177280, while the sum is 57.

The spelling of 97188251961 in words is "ninety-seven billion, one hundred eighty-eight million, two hundred fifty-one thousand, nine hundred sixty-one".