61567945 has 8 divisors (see below), whose sum is σ = 74295360. Its totient is φ = 48978480.

The previous prime is 61567921. The next prime is 61567993. The reversal of 61567945 is 54976516.

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

It is not a de Polignac number, because 61567945 - 2⁷ = 61567817 is a prime.

It is a super-2 number, since 2×61567945² = 7581223703046050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33501 + ... + 35290.

It is an arithmetic number, because the mean of its divisors is an integer number (9286920).

Almost surely, 2^61567945 is an apocalyptic number.

It is an amenable number.

61567945 is a deficient number, since it is larger than the sum of its proper divisors (12727415).

61567945 is a wasteful number, since it uses less digits than its factorization.

61567945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68975.

The product of its digits is 226800, while the sum is 43.

The square root of 61567945 is about 7846.5243898174. The cubic root of 61567945 is about 394.8676478012.

The spelling of 61567945 in words is "sixty-one million, five hundred sixty-seven thousand, nine hundred forty-five".