61863764 has 12 divisors (see below), whose sum is σ = 108585204. Its totient is φ = 30839424.

The previous prime is 61863733. The next prime is 61863839. The reversal of 61863764 is 46736816.

It can be written as a sum of positive squares in 2 ways, for example, as 14364100 + 47499664 = 3790^2 + 6892^2 .

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, 21599 + ... + 24294.

It is an arithmetic number, because the mean of its divisors is an integer number (9048767).

Almost surely, 2^61863764 is an apocalyptic number.

It is an amenable number.

61863764 is a deficient number, since it is larger than the sum of its proper divisors (46721440).

61863764 is a wasteful number, since it uses less digits than its factorization.

61863764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46234 (or 46232 counting only the distinct ones).

The product of its digits is 145152, while the sum is 41.

The square root of 61863764 is about 7865.3521218061. The cubic root of 61863764 is about 395.4990519640.

The spelling of 61863764 in words is "sixty-one million, eight hundred sixty-three thousand, seven hundred sixty-four".