61561063 has 4 divisors (see below), whose sum is σ = 65182320. Its totient is φ = 57939808.

The previous prime is 61561061. The next prime is 61561069. The reversal of 61561063 is 36016516.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 61561063 - 2¹ = 61561061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61561061) 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, 1810603 + ... + 1810636.

It is an arithmetic number, because the mean of its divisors is an integer number (16295580).

Almost surely, 2^61561063 is an apocalyptic number.

61561063 is a deficient number, since it is larger than the sum of its proper divisors (3621257).

61561063 is a wasteful number, since it uses less digits than its factorization.

61561063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3621256.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 61561063 is about 7846.0858394489. The cubic root of 61561063 is about 394.8529346232.

Adding to 61561063 its reverse (36016516), we get a palindrome (97577579).

The spelling of 61561063 in words is "sixty-one million, five hundred sixty-one thousand, sixty-three".