61645494 has 32 divisors (see below), whose sum is σ = 126610560. Its totient is φ = 20002752.

The previous prime is 61645471. The next prime is 61645627. The reversal of 61645494 is 49454616.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34917 + ... + 36639.

It is an arithmetic number, because the mean of its divisors is an integer number (3956580).

Almost surely, 2^61645494 is an apocalyptic number.

61645494 is an abundant number, since it is smaller than the sum of its proper divisors (64965066).

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

61645494 is a wasteful number, since it uses less digits than its factorization.

61645494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1884.

The product of its digits is 103680, while the sum is 39.

The square root of 61645494 is about 7851.4644493878. The cubic root of 61645494 is about 395.0333657656.

The spelling of 61645494 in words is "sixty-one million, six hundred forty-five thousand, four hundred ninety-four".