64307781198 has 16 divisors (see below), whose sum is σ = 142906180560. Its totient is φ = 21435927048.

The previous prime is 64307781173. The next prime is 64307781211. The reversal of 64307781198 is 89118770346.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 1190884837 = 64307781198 / (6 + 4 + 3 + 0 + 7 + 7 + 8 + 1 + 1 + 9 + 8).

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, 595442365 + ... + 595442472.

It is an arithmetic number, because the mean of its divisors is an integer number (8931636285).

Almost surely, 2^64307781198 is an apocalyptic number.

64307781198 is an abundant number, since it is smaller than the sum of its proper divisors (78598399362).

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

64307781198 is a wasteful number, since it uses less digits than its factorization.

64307781198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190884848 (or 1190884842 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 54.

The spelling of 64307781198 in words is "sixty-four billion, three hundred seven million, seven hundred eighty-one thousand, one hundred ninety-eight".