1201845648391 has 4 divisors (see below), whose sum is σ = 1202616558000. Its totient is φ = 1201074738784.

The previous prime is 1201845648379. The next prime is 1201845648401. The reversal of 1201845648391 is 1938465481021.

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

It is a cyclic number.

It is not a de Polignac number, because 1201845648391 - 2¹³ = 1201845640199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201845648491) 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, 385452466 + ... + 385455583.

It is an arithmetic number, because the mean of its divisors is an integer number (300654139500).

Almost surely, 2^{1201845648391} is an apocalyptic number.

1201845648391 is a deficient number, since it is larger than the sum of its proper divisors (770909609).

1201845648391 is an equidigital number, since it uses as much as digits as its factorization.

1201845648391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770909608.

The product of its (nonzero) digits is 1658880, while the sum is 52.

The spelling of 1201845648391 in words is "one trillion, two hundred one billion, eight hundred forty-five million, six hundred forty-eight thousand, three hundred ninety-one".