1356478749 has 24 divisors (see below), whose sum is σ = 2043455232. Its totient is φ = 866108160.

The previous prime is 1356478729. The next prime is 1356478759. The reversal of 1356478749 is 9478746531.

1356478749 is a `hidden beast` number, since 1 + 3 + 564 + 7 + 8 + 74 + 9 = 666.

It is not a de Polignac number, because 1356478749 - 2²⁰ = 1355430173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1356478695 and 1356478704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356478729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2002 + ... + 52124.

It is an arithmetic number, because the mean of its divisors is an integer number (85143968).

Almost surely, 2^1356478749 is an apocalyptic number.

It is an amenable number.

1356478749 is a deficient number, since it is larger than the sum of its proper divisors (686976483).

1356478749 is a wasteful number, since it uses less digits than its factorization.

1356478749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50257 (or 50254 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

The square root of 1356478749 is about 36830.4052244881. The cubic root of 1356478749 is about 1106.9746225972.

The spelling of 1356478749 in words is "one billion, three hundred fifty-six million, four hundred seventy-eight thousand, seven hundred forty-nine".