61564265 has 16 divisors (see below), whose sum is σ = 84575232. Its totient is φ = 42143424.

The previous prime is 61564241. The next prime is 61564271. The reversal of 61564265 is 56246516.

It is a cyclic number.

It is not a de Polignac number, because 61564265 - 2⁶ = 61564201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26792 + ... + 28998.

It is an arithmetic number, because the mean of its divisors is an integer number (5285952).

Almost surely, 2^61564265 is an apocalyptic number.

It is an amenable number.

61564265 is a deficient number, since it is larger than the sum of its proper divisors (23010967).

61564265 is a wasteful number, since it uses less digits than its factorization.

61564265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3016.

The product of its digits is 43200, while the sum is 35.

The square root of 61564265 is about 7846.2898875838. The cubic root of 61564265 is about 394.8597803853.

The spelling of 61564265 in words is "sixty-one million, five hundred sixty-four thousand, two hundred sixty-five".