61898512 has 20 divisors (see below), whose sum is σ = 129154060. Its totient is φ = 28568448.

The previous prime is 61898509. The next prime is 61898519. The reversal of 61898512 is 21589816.

61898512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 5588496 + 56310016 = 2364^2 + 7504^2 .

It is not an unprimeable number, because it can be changed into a prime (61898519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148587 + ... + 149002.

It is an arithmetic number, because the mean of its divisors is an integer number (6457703).

Almost surely, 2^61898512 is an apocalyptic number.

It is an amenable number.

61898512 is an abundant number, since it is smaller than the sum of its proper divisors (67255548).

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

61898512 is a wasteful number, since it uses less digits than its factorization.

61898512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297610 (or 297604 counting only the distinct ones).

The product of its digits is 34560, while the sum is 40.

The square root of 61898512 is about 7867.5607401532. The cubic root of 61898512 is about 395.5730868429.

The spelling of 61898512 in words is "sixty-one million, eight hundred ninety-eight thousand, five hundred twelve".