61000000061 has 64 divisors (see below), whose sum is σ = 87627724800. Its totient is φ = 40884652800.

The previous prime is 61000000037. The next prime is 61000000063. The reversal of 61000000061 is 16000000016.

61000000061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 61000000061 - 2¹⁰ = 60999999037 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 60999999982 and 61000000045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61000000063) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1133870 + ... + 1186448.

It is an arithmetic number, because the mean of its divisors is an integer number (1369183200).

Almost surely, 2^61000000061 is an apocalyptic number.

61000000061 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

61000000061 is a deficient number, since it is larger than the sum of its proper divisors (26627724739).

61000000061 is a wasteful number, since it uses less digits than its factorization.

61000000061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52690.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 61000000061 its reverse (16000000016), we get a palindrome (77000000077).

The spelling of 61000000061 in words is "sixty-one billion, sixty-one", and thus it is an aban number and an uban number.