711561216601998 has 96 divisors (see below), whose sum is σ = 1800508790246400. Its totient is φ = 198860487289920.

The previous prime is 711561216601927. The next prime is 711561216602009. The reversal of 711561216601998 is 899106612165117.

711561216601998 is a `hidden beast` number, since 7 + 1 + 1 + 5 + 6 + 1 + 2 + 16 + 601 + 9 + 9 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 25299193 + ... + 45422148.

It is an arithmetic number, because the mean of its divisors is an integer number (18755299898400).

Almost surely, 2^{711561216601998} is an apocalyptic number.

711561216601998 is an abundant number, since it is smaller than the sum of its proper divisors (1088947573644402).

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

711561216601998 is a wasteful number, since it uses less digits than its factorization.

711561216601998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70723102 (or 70723099 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 63.

The spelling of 711561216601998 in words is "seven hundred eleven trillion, five hundred sixty-one billion, two hundred sixteen million, six hundred one thousand, nine hundred ninety-eight".