1399663155 has 16 divisors (see below), whose sum is σ = 2443048704. Its totient is φ = 678624480.

The previous prime is 1399663129. The next prime is 1399663211. The reversal of 1399663155 is 5513669931.

1399663155 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1399663155 - 2⁹ = 1399662643 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4241239 + ... + 4241568.

It is an arithmetic number, because the mean of its divisors is an integer number (152690544).

Almost surely, 2^1399663155 is an apocalyptic number.

1399663155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1399663155 is a deficient number, since it is larger than the sum of its proper divisors (1043385549).

1399663155 is a wasteful number, since it uses less digits than its factorization.

1399663155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8482826.

The product of its digits is 656100, while the sum is 48.

The square root of 1399663155 is about 37412.0723162992. The cubic root of 1399663155 is about 1118.5992146998.

The spelling of 1399663155 in words is "one billion, three hundred ninety-nine million, six hundred sixty-three thousand, one hundred fifty-five".