181500047157 has 64 divisors (see below), whose sum is σ = 291883253760. Its totient is φ = 98855692800.

The previous prime is 181500047153. The next prime is 181500047221. The reversal of 181500047157 is 751740005181.

It is not a de Polignac number, because 181500047157 - 2² = 181500047153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181500047153) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3827569 + ... + 3874697.

It is an arithmetic number, because the mean of its divisors is an integer number (4560675840).

Almost surely, 2^181500047157 is an apocalyptic number.

It is an amenable number.

181500047157 is a deficient number, since it is larger than the sum of its proper divisors (110383206603).

181500047157 is a wasteful number, since it uses less digits than its factorization.

181500047157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47394.

The product of its (nonzero) digits is 39200, while the sum is 39.

The spelling of 181500047157 in words is "one hundred eighty-one billion, five hundred million, forty-seven thousand, one hundred fifty-seven".