189481388733 has 54 divisors (see below), whose sum is σ = 342930734874. Its totient is φ = 99928842048.

The previous prime is 189481388729. The next prime is 189481388741. The reversal of 189481388733 is 337883184981.

189481388733 is a `hidden beast` number, since 1 + 8 + 9 + 481 + 3 + 88 + 73 + 3 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 36945837369 + 152535551364 = 192213^2 + 390558^2 .

It is not a de Polignac number, because 189481388733 - 2² = 189481388729 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189481368733) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 32956143 + ... + 32961891.

Almost surely, 2^189481388733 is an apocalyptic number.

189481388733 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

189481388733 is a deficient number, since it is larger than the sum of its proper divisors (153449346141).

189481388733 is an frugal number, since it uses more digits than its factorization.

189481388733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11531 (or 5772 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 63.

The spelling of 189481388733 in words is "one hundred eighty-nine billion, four hundred eighty-one million, three hundred eighty-eight thousand, seven hundred thirty-three".