61567801 has 2 divisors, whose sum is σ = 61567802. Its totient is φ = 61567800.

The previous prime is 61567799. The next prime is 61567811. The reversal of 61567801 is 10876516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57153600 + 4414201 = 7560^2 + 2101^2 .

It is a cyclic number.

It is not a de Polignac number, because 61567801 - 2¹ = 61567799 is a prime.

It is a super-3 number, since 3×61567801³ (a number of 24 digits) contains 333 as substring.

Together with 61567799, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (61567811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30783900 + 30783901.

It is an arithmetic number, because the mean of its divisors is an integer number (30783901).

Almost surely, 2^61567801 is an apocalyptic number.

It is an amenable number.

61567801 is a deficient number, since it is larger than the sum of its proper divisors (1).

61567801 is an equidigital number, since it uses as much as digits as its factorization.

61567801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 61567801 is about 7846.5152137748. The cubic root of 61567801 is about 394.8673399517.

The spelling of 61567801 in words is "sixty-one million, five hundred sixty-seven thousand, eight hundred one".