187711201961 has 4 divisors (see below), whose sum is σ = 195872558592. Its totient is φ = 179549845332.

The previous prime is 187711201957. The next prime is 187711202033. The reversal of 187711201961 is 169102117781.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 187711201961 - 2² = 187711201957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (187711201921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4080678281 + ... + 4080678326.

It is an arithmetic number, because the mean of its divisors is an integer number (48968139648).

Almost surely, 2^187711201961 is an apocalyptic number.

It is an amenable number.

187711201961 is a deficient number, since it is larger than the sum of its proper divisors (8161356631).

187711201961 is an equidigital number, since it uses as much as digits as its factorization.

187711201961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8161356630.

The product of its (nonzero) digits is 42336, while the sum is 44.

The spelling of 187711201961 in words is "one hundred eighty-seven billion, seven hundred eleven million, two hundred one thousand, nine hundred sixty-one".