61898812862 has 16 divisors (see below), whose sum is σ = 93159510912. Its totient is φ = 30845727000.

The previous prime is 61898812861. The next prime is 61898812873. The reversal of 61898812862 is 26821889816.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61898812861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1542383 + ... + 1582005.

It is an arithmetic number, because the mean of its divisors is an integer number (5822469432).

Almost surely, 2^61898812862 is an apocalyptic number.

61898812862 is a deficient number, since it is larger than the sum of its proper divisors (31260698050).

61898812862 is a wasteful number, since it uses less digits than its factorization.

61898812862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42223.

The product of its digits is 5308416, while the sum is 59.

The spelling of 61898812862 in words is "sixty-one billion, eight hundred ninety-eight million, eight hundred twelve thousand, eight hundred sixty-two".