1164278161381 has 8 divisors (see below), whose sum is σ = 1184028564960. Its totient is φ = 1144528320432.

The previous prime is 1164278161349. The next prime is 1164278161391. The reversal of 1164278161381 is 1831618724611.

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

It is a cyclic number.

It is not a de Polignac number, because 1164278161381 - 2⁵ = 1164278161349 is a prime.

It is a super-2 number, since 2×1164278161381² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1164278161391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7837906 + ... + 7985068.

It is an arithmetic number, because the mean of its divisors is an integer number (148003570620).

Almost surely, 2^{1164278161381} is an apocalyptic number.

It is an amenable number.

1164278161381 is a deficient number, since it is larger than the sum of its proper divisors (19750403579).

1164278161381 is a wasteful number, since it uses less digits than its factorization.

1164278161381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281315.

The product of its digits is 387072, while the sum is 49.

The spelling of 1164278161381 in words is "one trillion, one hundred sixty-four billion, two hundred seventy-eight million, one hundred sixty-one thousand, three hundred eighty-one".