245791356781 has 16 divisors (see below), whose sum is σ = 265163996160. Its totient is φ = 227067736320.

The previous prime is 245791356773. The next prime is 245791356799. The reversal of 245791356781 is 187653197542.

It is a cyclic number.

It is not a de Polignac number, because 245791356781 - 2³ = 245791356773 is a prime.

It is a super-2 number, since 2×245791356781² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245791356731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1590900 + ... + 1738546.

It is an arithmetic number, because the mean of its divisors is an integer number (16572749760).

Almost surely, 2^245791356781 is an apocalyptic number.

It is an amenable number.

245791356781 is a deficient number, since it is larger than the sum of its proper divisors (19372639379).

245791356781 is a wasteful number, since it uses less digits than its factorization.

245791356781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149844.

The product of its digits is 12700800, while the sum is 58.

The spelling of 245791356781 in words is "two hundred forty-five billion, seven hundred ninety-one million, three hundred fifty-six thousand, seven hundred eighty-one".