61491850 has 24 divisors (see below), whose sum is σ = 130714848. Its totient is φ = 21082800.

The previous prime is 61491827. The next prime is 61491887. The reversal of 61491850 is 5819416.

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, 87496 + ... + 88195.

It is an arithmetic number, because the mean of its divisors is an integer number (5446452).

Almost surely, 2^61491850 is an apocalyptic number.

61491850 is an abundant number, since it is smaller than the sum of its proper divisors (69222998).

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

61491850 is a wasteful number, since it uses less digits than its factorization.

61491850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175710 (or 175705 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 61491850 is about 7841.6739284416. The cubic root of 61491850 is about 394.7049016339.

The spelling of 61491850 in words is "sixty-one million, four hundred ninety-one thousand, eight hundred fifty".