61813386 has 24 divisors (see below), whose sum is σ = 134074980. Its totient is φ = 20582016.

The previous prime is 61813379. The next prime is 61813393. The reversal of 61813386 is 68331816.

61813386 is a `hidden beast` number, since 618 + 1 + 3 + 38 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (61813379) and next prime (61813393).

It can be written as a sum of positive squares in 2 ways, for example, as 61544025 + 269361 = 7845^2 + 519^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61813386.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27970 + ... + 30098.

Almost surely, 2^61813386 is an apocalyptic number.

61813386 is an abundant number, since it is smaller than the sum of its proper divisors (72261594).

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

61813386 is a wasteful number, since it uses less digits than its factorization.

61813386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3750 (or 3747 counting only the distinct ones).

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

The square root of 61813386 is about 7862.1489428781. The cubic root of 61813386 is about 395.3916662032.

The spelling of 61813386 in words is "sixty-one million, eight hundred thirteen thousand, three hundred eighty-six".