60861561 has 4 divisors (see below), whose sum is σ = 81148752. Its totient is φ = 40574372.

The previous prime is 60861553. The next prime is 60861571. The reversal of 60861561 is 16516806.

60861561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 60861561 - 2³ = 60861553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (60861511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10143591 + ... + 10143596.

It is an arithmetic number, because the mean of its divisors is an integer number (20287188).

Almost surely, 2^60861561 is an apocalyptic number.

It is an amenable number.

60861561 is a deficient number, since it is larger than the sum of its proper divisors (20287191).

60861561 is a wasteful number, since it uses less digits than its factorization.

60861561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20287190.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 60861561 is about 7801.3819929548. The cubic root of 60861561 is about 393.3516978083.

The spelling of 60861561 in words is "sixty million, eight hundred sixty-one thousand, five hundred sixty-one".