565201978 has 16 divisors (see below), whose sum is σ = 944555904. Its totient is φ = 251443360.

The previous prime is 565201963. The next prime is 565201979. The reversal of 565201978 is 879102565.

It is a super-2 number, since 2×565201978² = 638906551870224968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (565201979) 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, 272275 + ... + 274342.

It is an arithmetic number, because the mean of its divisors is an integer number (59034744).

Almost surely, 2^565201978 is an apocalyptic number.

565201978 is a deficient number, since it is larger than the sum of its proper divisors (379353926).

565201978 is a wasteful number, since it uses less digits than its factorization.

565201978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546677.

The product of its (nonzero) digits is 151200, while the sum is 43.

The square root of 565201978 is about 23773.9769075348. The cubic root of 565201978 is about 826.8014400090.

The spelling of 565201978 in words is "five hundred sixty-five million, two hundred one thousand, nine hundred seventy-eight".