61745916 has 12 divisors (see below), whose sum is σ = 144073832. Its totient is φ = 20581968.

The previous prime is 61745897. The next prime is 61745923. The reversal of 61745916 is 61954716.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2572735 + ... + 2572758.

Almost surely, 2^61745916 is an apocalyptic number.

It is an amenable number.

61745916 is an abundant number, since it is smaller than the sum of its proper divisors (82327916).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61745916 is a wasteful number, since it uses less digits than its factorization.

61745916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5145500 (or 5145498 counting only the distinct ones).

The product of its digits is 45360, while the sum is 39.

The square root of 61745916 is about 7857.8569597569. The cubic root of 61745916 is about 395.2477556932.

It can be divided in two parts, 6174 and 5916, that added together give a triangular number (12090 = T₁₅₅).

The spelling of 61745916 in words is "sixty-one million, seven hundred forty-five thousand, nine hundred sixteen".