61898455 has 8 divisors (see below), whose sum is σ = 74430000. Its totient is φ = 49417536.

The previous prime is 61898453. The next prime is 61898467. The reversal of 61898455 is 55489816.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61898455 - 2¹ = 61898453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61898453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9910 + ... + 14899.

It is an arithmetic number, because the mean of its divisors is an integer number (9303750).

Almost surely, 2^61898455 is an apocalyptic number.

61898455 is a deficient number, since it is larger than the sum of its proper divisors (12531545).

61898455 is a wasteful number, since it uses less digits than its factorization.

61898455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25313.

The product of its digits is 345600, while the sum is 46.

The square root of 61898455 is about 7867.5571176827. The cubic root of 61898455 is about 395.5729654201.

The spelling of 61898455 in words is "sixty-one million, eight hundred ninety-eight thousand, four hundred fifty-five".