400561697297 has 8 divisors (see below), whose sum is σ = 402276273000. Its totient is φ = 398850361344.

The previous prime is 400561697293. The next prime is 400561697323. The reversal of 400561697297 is 792796165004.

It can be written as a sum of positive squares in 4 ways, for example, as 7634565376 + 392927131921 = 87376^2 + 626839^2 .

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 400561697297 - 2² = 400561697293 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400561697293) 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, 561968 + ... + 1056849.

It is an arithmetic number, because the mean of its divisors is an integer number (50284534125).

Almost surely, 2^400561697297 is an apocalyptic number.

It is an amenable number.

400561697297 is a deficient number, since it is larger than the sum of its proper divisors (1714575703).

400561697297 is a wasteful number, since it uses less digits than its factorization.

400561697297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1619875.

The product of its (nonzero) digits is 5715360, while the sum is 56.

The spelling of 400561697297 in words is "four hundred billion, five hundred sixty-one million, six hundred ninety-seven thousand, two hundred ninety-seven".