7197975820 has 24 divisors (see below), whose sum is σ = 17275142304. Its totient is φ = 2467877376.

The previous prime is 7197975817. The next prime is 7197975823. The reversal of 7197975820 is 285797917.

It is an interprime number because it is at equal distance from previous prime (7197975817) and next prime (7197975823).

It is not an unprimeable number, because it can be changed into a prime (7197975823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25706917 + ... + 25707196.

It is an arithmetic number, because the mean of its divisors is an integer number (719797596).

Almost surely, 2^7197975820 is an apocalyptic number.

7197975820 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7197975820 is an abundant number, since it is smaller than the sum of its proper divisors (10077166484).

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

7197975820 is a wasteful number, since it uses less digits than its factorization.

7197975820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51414129 (or 51414127 counting only the distinct ones).

The product of its (nonzero) digits is 2222640, while the sum is 55.

The square root of 7197975820 is about 84840.8853089122. The cubic root of 7197975820 is about 1930.7977962969.

The spelling of 7197975820 in words is "seven billion, one hundred ninety-seven million, nine hundred seventy-five thousand, eight hundred twenty".