1231953928170 has 128 divisors (see below), whose sum is σ = 3558025820160. Its totient is φ = 266686007040.

The previous prime is 1231953928157. The next prime is 1231953928211. The reversal of 1231953928170 is 718293591321.

It is a happy number.

It is a super-2 number, since 2×1231953928170² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13244344 + ... + 13337036.

It is an arithmetic number, because the mean of its divisors is an integer number (27797076720).

Almost surely, 2^{1231953928170} is an apocalyptic number.

1231953928170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231953928170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1779012910080).

1231953928170 is an abundant number, since it is smaller than the sum of its proper divisors (2326071891990).

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

1231953928170 is a wasteful number, since it uses less digits than its factorization.

1231953928170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96060.

The product of its (nonzero) digits is 816480, while the sum is 51.

The spelling of 1231953928170 in words is "one trillion, two hundred thirty-one billion, nine hundred fifty-three million, nine hundred twenty-eight thousand, one hundred seventy".