61517077 has 4 divisors (see below), whose sum is σ = 61678080. Its totient is φ = 61356076.

The previous prime is 61517039. The next prime is 61517081. The reversal of 61517077 is 77071516.

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-61517077 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 (61517017) 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, 79927 + ... + 80692.

It is an arithmetic number, because the mean of its divisors is an integer number (15419520).

Almost surely, 2^61517077 is an apocalyptic number.

It is an amenable number.

61517077 is a deficient number, since it is larger than the sum of its proper divisors (161003).

61517077 is a wasteful number, since it uses less digits than its factorization.

61517077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161002.

The product of its (nonzero) digits is 10290, while the sum is 34.

The square root of 61517077 is about 7843.2822848601. The cubic root of 61517077 is about 394.7588700824.

The spelling of 61517077 in words is "sixty-one million, five hundred seventeen thousand, seventy-seven".