2780558361394 has 16 divisors (see below), whose sum is σ = 4592528002656. Its totient is φ = 1252078105600.

The previous prime is 2780558361389. The next prime is 2780558361407. The reversal of 2780558361394 is 4931638550872.

It is a happy number.

It is a super-2 number, since 2×2780558361394² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 590600527 + ... + 590605234.

It is an arithmetic number, because the mean of its divisors is an integer number (287033000166).

It is a 1-persistent number, because it is pandigital, but 2⋅2780558361394 = 5561116722788 is not.

Almost surely, 2^{2780558361394} is an apocalyptic number.

2780558361394 is a deficient number, since it is larger than the sum of its proper divisors (1811969641262).

2780558361394 is a wasteful number, since it uses less digits than its factorization.

2780558361394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181205881.

The product of its (nonzero) digits is 43545600, while the sum is 61.

The spelling of 2780558361394 in words is "two trillion, seven hundred eighty billion, five hundred fifty-eight million, three hundred sixty-one thousand, three hundred ninety-four".