61564105 has 16 divisors (see below), whose sum is σ = 74980224. Its totient is φ = 48522240.

The previous prime is 61564079. The next prime is 61564127. The reversal of 61564105 is 50146516.

It is not a de Polignac number, because 61564105 - 2¹³ = 61555913 is a prime.

It is a Duffinian number.

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, 126172 + ... + 126658.

It is an arithmetic number, because the mean of its divisors is an integer number (4686264).

Almost surely, 2^61564105 is an apocalyptic number.

It is an amenable number.

61564105 is a deficient number, since it is larger than the sum of its proper divisors (13416119).

61564105 is a wasteful number, since it uses less digits than its factorization.

61564105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 61564105 is about 7846.2796916755. The cubic root of 61564105 is about 394.8594383166.

The spelling of 61564105 in words is "sixty-one million, five hundred sixty-four thousand, one hundred five".