897169781951 has 8 divisors (see below), whose sum is σ = 898244212800. Its totient is φ = 896095549440.

The previous prime is 897169781939. The next prime is 897169781983. The reversal of 897169781951 is 159187961798.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-897169781951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (897169780951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10277255 + ... + 10364183.

It is an arithmetic number, because the mean of its divisors is an integer number (112280526600).

Almost surely, 2^897169781951 is an apocalyptic number.

897169781951 is a deficient number, since it is larger than the sum of its proper divisors (1074430849).

897169781951 is a wasteful number, since it uses less digits than its factorization.

897169781951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99169.

The product of its digits is 68584320, while the sum is 71.

The spelling of 897169781951 in words is "eight hundred ninety-seven billion, one hundred sixty-nine million, seven hundred eighty-one thousand, nine hundred fifty-one".