61564051 has 2 divisors, whose sum is σ = 61564052. Its totient is φ = 61564050.

The previous prime is 61564037. The next prime is 61564079. The reversal of 61564051 is 15046516.

It is an a-pointer prime, because the next prime (61564079) can be obtained adding 61564051 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61564051 - 2¹³ = 61555859 is a prime.

It is not a weakly prime, because it can be changed into another prime (61561051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30782025 + 30782026.

It is an arithmetic number, because the mean of its divisors is an integer number (30782026).

Almost surely, 2^61564051 is an apocalyptic number.

61564051 is a deficient number, since it is larger than the sum of its proper divisors (1).

61564051 is an equidigital number, since it uses as much as digits as its factorization.

61564051 is an evil number, because the sum of its binary digits is even.

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

The square root of 61564051 is about 7846.2762505535. The cubic root of 61564051 is about 394.8593228683.

The spelling of 61564051 in words is "sixty-one million, five hundred sixty-four thousand, fifty-one".