60561881 has 4 divisors (see below), whose sum is σ = 61704612. Its totient is φ = 59419152.

The previous prime is 60561877. The next prime is 60561901. The reversal of 60561881 is 18816506.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18816506 = 2 ⋅9408253.

It can be written as a sum of positive squares in 2 ways, for example, as 28526281 + 32035600 = 5341^2 + 5660^2 .

It is a cyclic number.

It is not a de Polignac number, because 60561881 - 2² = 60561877 is a prime.

It is a super-2 number, since 2×60561881² = 7335482860516322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (60561811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 571286 + ... + 571391.

It is an arithmetic number, because the mean of its divisors is an integer number (15426153).

Almost surely, 2^60561881 is an apocalyptic number.

It is an amenable number.

60561881 is a deficient number, since it is larger than the sum of its proper divisors (1142731).

60561881 is a wasteful number, since it uses less digits than its factorization.

60561881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142730.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 60561881 is about 7782.1514377452. The cubic root of 60561881 is about 392.7050189953.

The spelling of 60561881 in words is "sixty million, five hundred sixty-one thousand, eight hundred eighty-one".