307845695381 has 4 divisors (see below), whose sum is σ = 351823651872. Its totient is φ = 263867738892.

The previous prime is 307845695371. The next prime is 307845695413. The reversal of 307845695381 is 183596548703.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-307845695381 is a prime.

It is a super-2 number, since 2×307845695381² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 307845695381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (307845695351) 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, 21988978235 + ... + 21988978248.

It is an arithmetic number, because the mean of its divisors is an integer number (87955912968).

Almost surely, 2^307845695381 is an apocalyptic number.

It is an amenable number.

307845695381 is a deficient number, since it is larger than the sum of its proper divisors (43977956491).

307845695381 is an equidigital number, since it uses as much as digits as its factorization.

307845695381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43977956490.

The product of its (nonzero) digits is 21772800, while the sum is 59.

The spelling of 307845695381 in words is "three hundred seven billion, eight hundred forty-five million, six hundred ninety-five thousand, three hundred eighty-one".