149161687643 has 2 divisors, whose sum is σ = 149161687644. Its totient is φ = 149161687642.

The previous prime is 149161687639. The next prime is 149161687673. The reversal of 149161687643 is 346786161941.

It is a weak prime.

It is an emirp because it is prime and its reverse (346786161941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149161687643 - 2² = 149161687639 is a prime.

It is not a weakly prime, because it can be changed into another prime (149161687613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74580843821 + 74580843822.

It is an arithmetic number, because the mean of its divisors is an integer number (74580843822).

Almost surely, 2^149161687643 is an apocalyptic number.

149161687643 is a deficient number, since it is larger than the sum of its proper divisors (1).

149161687643 is an equidigital number, since it uses as much as digits as its factorization.

149161687643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5225472, while the sum is 56.

The spelling of 149161687643 in words is "one hundred forty-nine billion, one hundred sixty-one million, six hundred eighty-seven thousand, six hundred forty-three".