187738413545 has 4 divisors (see below), whose sum is σ = 225286096260. Its totient is φ = 150190730832.

The previous prime is 187738413523. The next prime is 187738413559. The reversal of 187738413545 is 545314837781.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 87631984729 + 100106428816 = 296027^2 + 316396^2 .

It is a cyclic number.

It is not a de Polignac number, because 187738413545 - 2¹⁶ = 187738348009 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18773841350 + ... + 18773841359.

It is an arithmetic number, because the mean of its divisors is an integer number (56321524065).

Almost surely, 2^187738413545 is an apocalyptic number.

It is an amenable number.

187738413545 is a deficient number, since it is larger than the sum of its proper divisors (37547682715).

187738413545 is an equidigital number, since it uses as much as digits as its factorization.

187738413545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37547682714.

The product of its digits is 11289600, while the sum is 56.

The spelling of 187738413545 in words is "one hundred eighty-seven billion, seven hundred thirty-eight million, four hundred thirteen thousand, five hundred forty-five".