1953033831966 has 32 divisors (see below), whose sum is σ = 4699028770560. Its totient is φ = 528640736256.

The previous prime is 1953033831919. The next prime is 1953033831967. The reversal of 1953033831966 is 6691383303591.

It is a super-2 number, since 2×1953033831966² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1953033831967) 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, 1223704611 + ... + 1223706206.

It is an arithmetic number, because the mean of its divisors is an integer number (146844649080).

Almost surely, 2^{1953033831966} is an apocalyptic number.

1953033831966 is an abundant number, since it is smaller than the sum of its proper divisors (2745994938594).

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

1953033831966 is a wasteful number, since it uses less digits than its factorization.

1953033831966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2447410848.

The product of its (nonzero) digits is 9447840, while the sum is 57.

The spelling of 1953033831966 in words is "one trillion, nine hundred fifty-three billion, thirty-three million, eight hundred thirty-one thousand, nine hundred sixty-six".