2278182178461 has 16 divisors (see below), whose sum is σ = 3471639580800. Its totient is φ = 1301771932608.

The previous prime is 2278182178457. The next prime is 2278182178513. The reversal of 2278182178461 is 1648712818722.

It is not a de Polignac number, because 2278182178461 - 2² = 2278182178457 is a prime.

It is a super-2 number, since 2×2278182178461² (a number of 26 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2278182178451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1328706 + ... + 2514323.

It is an arithmetic number, because the mean of its divisors is an integer number (216977473800).

Almost surely, 2^{2278182178461} is an apocalyptic number.

2278182178461 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2278182178461 is a deficient number, since it is larger than the sum of its proper divisors (1193457402339).

2278182178461 is a wasteful number, since it uses less digits than its factorization.

2278182178461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3871268.

The product of its digits is 4816896, while the sum is 57.

The spelling of 2278182178461 in words is "two trillion, two hundred seventy-eight billion, one hundred eighty-two million, one hundred seventy-eight thousand, four hundred sixty-one".