7721951980098 has 16 divisors (see below), whose sum is σ = 15452158340736. Its totient is φ = 2572608263280.

The previous prime is 7721951980097. The next prime is 7721951980133. The reversal of 7721951980098 is 8900891591277.

It is not an unprimeable number, because it can be changed into a prime (7721951980097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343920361 + ... + 343942812.

It is an arithmetic number, because the mean of its divisors is an integer number (965759896296).

Almost surely, 2^{7721951980098} is an apocalyptic number.

7721951980098 is an abundant number, since it is smaller than the sum of its proper divisors (7730206360638).

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

7721951980098 is a wasteful number, since it uses less digits than its factorization.

7721951980098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687865049.

The product of its (nonzero) digits is 22861440, while the sum is 66.

The spelling of 7721951980098 in words is "seven trillion, seven hundred twenty-one billion, nine hundred fifty-one million, nine hundred eighty thousand, ninety-eight".