61427565 has 20 divisors (see below), whose sum is σ = 110115324. Its totient is φ = 32761152.

The previous prime is 61427563. The next prime is 61427617. The reversal of 61427565 is 56572416.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 32558436 + 28869129 = 5706^2 + 5373^2 .

It is not a de Polignac number, because 61427565 - 2¹ = 61427563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61427563) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 75432 + ... + 76241.

Almost surely, 2^61427565 is an apocalyptic number.

It is an amenable number.

61427565 is a deficient number, since it is larger than the sum of its proper divisors (48687759).

61427565 is a wasteful number, since it uses less digits than its factorization.

61427565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151690 (or 151681 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 61427565 is about 7837.5739230964. The cubic root of 61427565 is about 394.5673091356.

The spelling of 61427565 in words is "sixty-one million, four hundred twenty-seven thousand, five hundred sixty-five".