7721951980049 has 8 divisors (see below), whose sum is σ = 7724050941600. Its totient is φ = 7719853308256.

The previous prime is 7721951980037. The next prime is 7721951980069. The reversal of 7721951980049 is 9400891591277.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7721951980049 - 2²⁰ = 7721950931473 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7721951979973 and 7721951980000.

It is not an unprimeable number, because it can be changed into a prime (7721951980069) 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, 59757062 + ... + 59886144.

It is an arithmetic number, because the mean of its divisors is an integer number (965506367700).

Almost surely, 2^{7721951980049} is an apocalyptic number.

It is an amenable number.

7721951980049 is a deficient number, since it is larger than the sum of its proper divisors (2098961551).

7721951980049 is a wasteful number, since it uses less digits than its factorization.

7721951980049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144879.

The product of its (nonzero) digits is 11430720, while the sum is 62.

The spelling of 7721951980049 in words is "seven trillion, seven hundred twenty-one billion, nine hundred fifty-one million, nine hundred eighty thousand, forty-nine".