897405777722 has 32 divisors (see below), whose sum is σ = 1470820377600. Its totient is φ = 409027848768.

The previous prime is 897405777713. The next prime is 897405777731. The reversal of 897405777722 is 227777504798.

It is an interprime number because it is at equal distance from previous prime (897405777713) and next prime (897405777731).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1066778 + ... + 1712549.

It is an arithmetic number, because the mean of its divisors is an integer number (45963136800).

Almost surely, 2^897405777722 is an apocalyptic number.

897405777722 is a deficient number, since it is larger than the sum of its proper divisors (573414599878).

897405777722 is a wasteful number, since it uses less digits than its factorization.

897405777722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2779670.

The product of its (nonzero) digits is 96808320, while the sum is 65.

The spelling of 897405777722 in words is "eight hundred ninety-seven billion, four hundred five million, seven hundred seventy-seven thousand, seven hundred twenty-two".