245203121040 has 40 divisors (see below), whose sum is σ = 760129675968. Its totient is φ = 65387498880.

The previous prime is 245203121039. The next prime is 245203121041. The reversal of 245203121040 is 40121302542.

It is an interprime number because it is at equal distance from previous prime (245203121039) and next prime (245203121041).

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 245203121040.

It is not an unprimeable number, because it can be changed into a prime (245203121041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 510839596 + ... + 510840075.

Almost surely, 2^245203121040 is an apocalyptic number.

245203121040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245203121040 is an abundant number, since it is smaller than the sum of its proper divisors (514926554928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

245203121040 is a wasteful number, since it uses less digits than its factorization.

245203121040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021679687 (or 1021679681 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 245203121040 its reverse (40121302542), we get a palindrome (285324423582).

The spelling of 245203121040 in words is "two hundred forty-five billion, two hundred three million, one hundred twenty-one thousand, forty".