1398034649278 has 16 divisors (see below), whose sum is σ = 2199566130336. Its totient is φ = 665160883200.

The previous prime is 1398034649257. The next prime is 1398034649281. The reversal of 1398034649278 is 8729464308931.

It is a congruent number.

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, 78727023 + ... + 78744778.

It is an arithmetic number, because the mean of its divisors is an integer number (137472883146).

Almost surely, 2^{1398034649278} is an apocalyptic number.

1398034649278 is a deficient number, since it is larger than the sum of its proper divisors (801531481058).

1398034649278 is a wasteful number, since it uses less digits than its factorization.

1398034649278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157472019.

The product of its (nonzero) digits is 62705664, while the sum is 64.

The spelling of 1398034649278 in words is "one trillion, three hundred ninety-eight billion, thirty-four million, six hundred forty-nine thousand, two hundred seventy-eight".