409787980245 has 36 divisors (see below), whose sum is σ = 826266380940. Its totient is φ = 187331647104.

The previous prime is 409787980243. The next prime is 409787980291. The reversal of 409787980245 is 542089787904.

It can be written as a sum of positive squares in 2 ways, for example, as 63525169764 + 346262810481 = 252042^2 + 588441^2 .

It is not a de Polignac number, because 409787980245 - 2¹ = 409787980243 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409787980243) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 92920240 + ... + 92924649.

It is an arithmetic number, because the mean of its divisors is an integer number (22951843915).

Almost surely, 2^409787980245 is an apocalyptic number.

409787980245 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

409787980245 is an abundant number, since it is smaller than the sum of its proper divisors (416478400695).

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

409787980245 is a wasteful number, since it uses less digits than its factorization.

409787980245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185844914 (or 185844904 counting only the distinct ones).

The product of its (nonzero) digits is 40642560, while the sum is 63.

The spelling of 409787980245 in words is "four hundred nine billion, seven hundred eighty-seven million, nine hundred eighty thousand, two hundred forty-five".