1953571812 has 12 divisors (see below), whose sum is σ = 4558334256. Its totient is φ = 651190600.

The previous prime is 1953571799. The next prime is 1953571817. The reversal of 1953571812 is 2181753591.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1953571817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81398814 + ... + 81398837.

It is an arithmetic number, because the mean of its divisors is an integer number (379861188).

Almost surely, 2^1953571812 is an apocalyptic number.

1953571812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1953571812 is an abundant number, since it is smaller than the sum of its proper divisors (2604762444).

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

1953571812 is a wasteful number, since it uses less digits than its factorization.

1953571812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162797658 (or 162797656 counting only the distinct ones).

The product of its digits is 75600, while the sum is 42.

The square root of 1953571812 is about 44199.2286358031. The cubic root of 1953571812 is about 1250.0953126256.

The spelling of 1953571812 in words is "one billion, nine hundred fifty-three million, five hundred seventy-one thousand, eight hundred twelve".