61545717 has 8 divisors (see below), whose sum is σ = 91178880. Its totient is φ = 41030460.

The previous prime is 61545709. The next prime is 61545721. The reversal of 61545717 is 71754516.

It is not a de Polignac number, because 61545717 - 2³ = 61545709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61545707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1139709 + ... + 1139762.

It is an arithmetic number, because the mean of its divisors is an integer number (11397360).

Almost surely, 2^61545717 is an apocalyptic number.

It is an amenable number.

61545717 is a deficient number, since it is larger than the sum of its proper divisors (29633163).

61545717 is a wasteful number, since it uses less digits than its factorization.

61545717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2279480 (or 2279474 counting only the distinct ones).

The product of its digits is 29400, while the sum is 36.

The square root of 61545717 is about 7845.1078386470. The cubic root of 61545717 is about 394.8201221255.

The spelling of 61545717 in words is "sixty-one million, five hundred forty-five thousand, seven hundred seventeen".