5642780872465 has 12 divisors (see below), whose sum is σ = 7442874606132. Its totient is φ = 4103840634080.

The previous prime is 5642780872451. The next prime is 5642780872517.

5642780872465 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 997337774224 + 4645443098241 = 998668^2 + 2155329^2 .

It is not a de Polignac number, because 5642780872465 - 2¹¹ = 5642780870417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5642780872397 and 5642780872406.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4663454662 + ... + 4663455871.

It is an arithmetic number, because the mean of its divisors is an integer number (620239550511).

Almost surely, 2^{5642780872465} is an apocalyptic number.

5642780872465 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5642780872465 is a deficient number, since it is larger than the sum of its proper divisors (1800093733667).

5642780872465 is a wasteful number, since it uses less digits than its factorization.

5642780872465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9326910560 (or 9326910549 counting only the distinct ones).

The product of its (nonzero) digits is 180633600, while the sum is 64.

The spelling of 5642780872465 in words is "five trillion, six hundred forty-two billion, seven hundred eighty million, eight hundred seventy-two thousand, four hundred sixty-five".