61820694 has 72 divisors (see below), whose sum is σ = 148717296. Its totient is φ = 18446400.

The previous prime is 61820683. The next prime is 61820701. The reversal of 61820694 is 49602816.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 870679 + ... + 870749.

It is an arithmetic number, because the mean of its divisors is an integer number (2065518).

Almost surely, 2^61820694 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61820694, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74358648).

61820694 is an abundant number, since it is smaller than the sum of its proper divisors (86896602).

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

61820694 is a wasteful number, since it uses less digits than its factorization.

61820694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 61820694 is about 7862.6136875723. The cubic root of 61820694 is about 395.4072475555.

It can be divided in two parts, 618 and 20694, that added together give a palindrome (21312).

The spelling of 61820694 in words is "sixty-one million, eight hundred twenty thousand, six hundred ninety-four".