61201617101 has 4 divisors (see below), whose sum is σ = 61202114652. Its totient is φ = 61201119552.

The previous prime is 61201617067. The next prime is 61201617109. The reversal of 61201617101 is 10171610216.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2225008900 + 58976608201 = 47170^2 + 242851^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61201617101 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 (61201617109) 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, 85061 + ... + 360053.

It is an arithmetic number, because the mean of its divisors is an integer number (15300528663).

Almost surely, 2^61201617101 is an apocalyptic number.

It is an amenable number.

61201617101 is a deficient number, since it is larger than the sum of its proper divisors (497551).

61201617101 is a wasteful number, since it uses less digits than its factorization.

61201617101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497550.

The product of its (nonzero) digits is 504, while the sum is 26.

The spelling of 61201617101 in words is "sixty-one billion, two hundred one million, six hundred seventeen thousand, one hundred one".