7157865681420 has 48 divisors (see below), whose sum is σ = 20316572193120. Its totient is φ = 1882616726016.

The previous prime is 7157865681391. The next prime is 7157865681427. The reversal of 7157865681420 is 241865687517.

It is a super-2 number, since 2×7157865681420² (a number of 27 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is not an unprimeable number, because it can be changed into a prime (7157865681427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 817103575 + ... + 817112334.

It is an arithmetic number, because the mean of its divisors is an integer number (423261920690).

Almost surely, 2^{7157865681420} is an apocalyptic number.

It is an amenable number.

7157865681420 is an abundant number, since it is smaller than the sum of its proper divisors (13158706511700).

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

7157865681420 is a wasteful number, since it uses less digits than its factorization.

7157865681420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634215994 (or 1634215992 counting only the distinct ones).

The product of its (nonzero) digits is 22579200, while the sum is 60.

The spelling of 7157865681420 in words is "seven trillion, one hundred fifty-seven billion, eight hundred sixty-five million, six hundred eighty-one thousand, four hundred twenty".