397035220561 has 8 divisors (see below), whose sum is σ = 454123753920. Its totient is φ = 340038991248.

The previous prime is 397035220553. The next prime is 397035220573. The reversal of 397035220561 is 165022530793.

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

It is a cyclic number.

It is not a de Polignac number, because 397035220561 - 2³ = 397035220553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397035220261) 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, 23066791 + ... + 23083996.

It is an arithmetic number, because the mean of its divisors is an integer number (56765469240).

Almost surely, 2^397035220561 is an apocalyptic number.

It is an amenable number.

397035220561 is a deficient number, since it is larger than the sum of its proper divisors (57088533359).

397035220561 is a wasteful number, since it uses less digits than its factorization.

397035220561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46152023.

The product of its (nonzero) digits is 340200, while the sum is 43.

The spelling of 397035220561 in words is "three hundred ninety-seven billion, thirty-five million, two hundred twenty thousand, five hundred sixty-one".