245421631245 has 128 divisors (see below), whose sum is σ = 470617620480. Its totient is φ = 106872145920.

The previous prime is 245421631243. The next prime is 245421631253. The reversal of 245421631245 is 542136124542.

It is not a de Polignac number, because 245421631245 - 2¹ = 245421631243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245421631243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 102987324 + ... + 102989706.

It is an arithmetic number, because the mean of its divisors is an integer number (3676700160).

Almost surely, 2^245421631245 is an apocalyptic number.

It is an amenable number.

245421631245 is a deficient number, since it is larger than the sum of its proper divisors (225195989235).

245421631245 is a wasteful number, since it uses less digits than its factorization.

245421631245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2995.

The product of its digits is 230400, while the sum is 39.

Adding to 245421631245 its reverse (542136124542), we get a palindrome (787557755787).

The spelling of 245421631245 in words is "two hundred forty-five billion, four hundred twenty-one million, six hundred thirty-one thousand, two hundred forty-five".