61638010 has 16 divisors (see below), whose sum is σ = 126798336. Its totient is φ = 21133008.

The previous prime is 61638007. The next prime is 61638019. The reversal of 61638010 is 1083616.

It is not an unprimeable number, because it can be changed into a prime (61638019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440202 + ... + 440341.

It is an arithmetic number, because the mean of its divisors is an integer number (7924896).

Almost surely, 2^61638010 is an apocalyptic number.

61638010 is an abundant number, since it is smaller than the sum of its proper divisors (65160326).

61638010 is a wasteful number, since it uses less digits than its factorization.

61638010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880557.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 61638010 is about 7850.9878359350. The cubic root of 61638010 is about 395.0173789288.

The spelling of 61638010 in words is "sixty-one million, six hundred thirty-eight thousand, ten".