1375561869 has 8 divisors (see below), whose sum is σ = 2000817312. Its totient is φ = 833673840.

The previous prime is 1375561819. The next prime is 1375561879. The reversal of 1375561869 is 9681655731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1375561869 - 2⁷ = 1375561741 is a prime.

It is a super-2 number, since 2×1375561869² = 3784340910893546322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375561819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20841814 + ... + 20841879.

It is an arithmetic number, because the mean of its divisors is an integer number (250102164).

Almost surely, 2^1375561869 is an apocalyptic number.

It is an amenable number.

1375561869 is a deficient number, since it is larger than the sum of its proper divisors (625255443).

1375561869 is a wasteful number, since it uses less digits than its factorization.

1375561869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41683707.

The product of its digits is 1360800, while the sum is 51.

The square root of 1375561869 is about 37088.5679017133. The cubic root of 1375561869 is about 1112.1414895636.

The spelling of 1375561869 in words is "one billion, three hundred seventy-five million, five hundred sixty-one thousand, eight hundred sixty-nine".