7921140772990 has 8 divisors (see below), whose sum is σ = 14258053391400. Its totient is φ = 3168456309192.

The previous prime is 7921140772973. The next prime is 7921140772997. The reversal of 7921140772990 is 992770411297.

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

It is a super-2 number, since 2×7921140772990² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7921140772997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 396057038640 + ... + 396057038659.

It is an arithmetic number, because the mean of its divisors is an integer number (1782256673925).

Almost surely, 2^{7921140772990} is an apocalyptic number.

7921140772990 is a deficient number, since it is larger than the sum of its proper divisors (6336912618410).

7921140772990 is a wasteful number, since it uses less digits than its factorization.

7921140772990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792114077306.

The product of its (nonzero) digits is 4000752, while the sum is 58.

The spelling of 7921140772990 in words is "seven trillion, nine hundred twenty-one billion, one hundred forty million, seven hundred seventy-two thousand, nine hundred ninety".