61695890 has 64 divisors (see below), whose sum is σ = 126904320. Its totient is φ = 21457920.

The previous prime is 61695863. The next prime is 61695899. The reversal of 61695890 is 9859616.

It is not an unprimeable number, because it can be changed into a prime (61695899) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120956 + ... + 121464.

It is an arithmetic number, because the mean of its divisors is an integer number (1982880).

Almost surely, 2^61695890 is an apocalyptic number.

61695890 is an abundant number, since it is smaller than the sum of its proper divisors (65208430).

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

61695890 is a wasteful number, since it uses less digits than its factorization.

61695890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 61695890 is about 7854.6731313276. The cubic root of 61695890 is about 395.1409847638.

The spelling of 61695890 in words is "sixty-one million, six hundred ninety-five thousand, eight hundred ninety".