61517901 has 8 divisors (see below), whose sum is σ = 82365184. Its totient is φ = 40841280.

The previous prime is 61517887. The next prime is 61517909. The reversal of 61517901 is 10971516.

61517901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61517901 - 2⁶ = 61517837 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 (61517909) 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 7 ways as a sum of consecutive naturals, for example, 41821 + ... + 43266.

It is an arithmetic number, because the mean of its divisors is an integer number (10295648).

Almost surely, 2^61517901 is an apocalyptic number.

It is an amenable number.

61517901 is a deficient number, since it is larger than the sum of its proper divisors (20847283).

61517901 is a wasteful number, since it uses less digits than its factorization.

61517901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85331.

The product of its (nonzero) digits is 1890, while the sum is 30.

The square root of 61517901 is about 7843.3348137129. The cubic root of 61517901 is about 394.7606326274.

The spelling of 61517901 in words is "sixty-one million, five hundred seventeen thousand, nine hundred one".