61516417 has 4 divisors (see below), whose sum is σ = 61808176. Its totient is φ = 61224660.

The previous prime is 61516391. The next prime is 61516423. The reversal of 61516417 is 71461516.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61516417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61516447) 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, 145563 + ... + 145984.

It is an arithmetic number, because the mean of its divisors is an integer number (15452044).

Almost surely, 2^61516417 is an apocalyptic number.

It is an amenable number.

61516417 is a deficient number, since it is larger than the sum of its proper divisors (291759).

61516417 is a wasteful number, since it uses less digits than its factorization.

61516417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291758.

The product of its digits is 5040, while the sum is 31.

The square root of 61516417 is about 7843.2402105252. The cubic root of 61516417 is about 394.7574583238.

The spelling of 61516417 in words is "sixty-one million, five hundred sixteen thousand, four hundred seventeen".