181404953472 has 128 divisors (see below), whose sum is σ = 513023565600. Its totient is φ = 56596561920.

The previous prime is 181404953383. The next prime is 181404953491. The reversal of 181404953472 is 274359404181.

It is a tau number, because it is divible by the number of its divisors (128).

It is a hoax number, since the sum of its digits (48) 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 (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1104804 + ... + 1258332.

Almost surely, 2^181404953472 is an apocalyptic number.

181404953472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 181404953472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256511782800).

181404953472 is an abundant number, since it is smaller than the sum of its proper divisors (331618612128).

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

181404953472 is a wasteful number, since it uses less digits than its factorization.

181404953472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153744 (or 153732 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 48.

The spelling of 181404953472 in words is "one hundred eighty-one billion, four hundred four million, nine hundred fifty-three thousand, four hundred seventy-two".