7311985401 has 8 divisors (see below), whose sum is σ = 11142073024. Its totient is φ = 4178277360.

The previous prime is 7311985397. The next prime is 7311985409. The reversal of 7311985401 is 1045891137.

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

It is not a de Polignac number, because 7311985401 - 2² = 7311985397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7311985401.

It is not an unprimeable number, because it can be changed into a prime (7311985409) 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, 174094870 + ... + 174094911.

It is an arithmetic number, because the mean of its divisors is an integer number (1392759128).

Almost surely, 2^7311985401 is an apocalyptic number.

It is an amenable number.

7311985401 is a deficient number, since it is larger than the sum of its proper divisors (3830087623).

7311985401 is a wasteful number, since it uses less digits than its factorization.

7311985401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348189791.

The product of its (nonzero) digits is 30240, while the sum is 39.

The square root of 7311985401 is about 85510.1479416332. The cubic root of 7311985401 is about 1940.9384874551.

The spelling of 7311985401 in words is "seven billion, three hundred eleven million, nine hundred eighty-five thousand, four hundred one".