61238398998 has 16 divisors (see below), whose sum is σ = 139973483520. Its totient is φ = 17496685416.

The previous prime is 61238398939. The next prime is 61238399003. The reversal of 61238398998 is 89989383216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 729028518 + ... + 729028601.

It is an arithmetic number, because the mean of its divisors is an integer number (8748342720).

Almost surely, 2^61238398998 is an apocalyptic number.

61238398998 is an abundant number, since it is smaller than the sum of its proper divisors (78735084522).

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

61238398998 is a wasteful number, since it uses less digits than its factorization.

61238398998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458057131.

The product of its digits is 40310784, while the sum is 66.

The spelling of 61238398998 in words is "sixty-one billion, two hundred thirty-eight million, three hundred ninety-eight thousand, nine hundred ninety-eight".