61645546 has 16 divisors (see below), whose sum is σ = 96215040. Its totient is φ = 29589840.

The previous prime is 61645471. The next prime is 61645627. The reversal of 61645546 is 64554616.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3960 + ... + 11788.

It is an arithmetic number, because the mean of its divisors is an integer number (6013440).

Almost surely, 2^61645546 is an apocalyptic number.

61645546 is a deficient number, since it is larger than the sum of its proper divisors (34569494).

61645546 is a wasteful number, since it uses less digits than its factorization.

61645546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7989.

The product of its digits is 86400, while the sum is 37.

The square root of 61645546 is about 7851.4677608712. The cubic root of 61645546 is about 395.0334768401.

The spelling of 61645546 in words is "sixty-one million, six hundred forty-five thousand, five hundred forty-six".