11485978381 has 8 divisors (see below), whose sum is σ = 11504803328. Its totient is φ = 11467170000.

The previous prime is 11485978331. The next prime is 11485978417. The reversal of 11485978381 is 18387958411.

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 11485978381 - 2⁷ = 11485978253 is a prime.

It is a super-2 number, since 2×11485978381² (a number of 21 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 (11485978321) 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, 2317456 + ... + 2322406.

It is an arithmetic number, because the mean of its divisors is an integer number (1438100416).

Almost surely, 2^11485978381 is an apocalyptic number.

It is an amenable number.

11485978381 is a deficient number, since it is larger than the sum of its proper divisors (18824947).

11485978381 is an equidigital number, since it uses as much as digits as its factorization.

11485978381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8283.

The product of its digits is 1935360, while the sum is 55.

The spelling of 11485978381 in words is "eleven billion, four hundred eighty-five million, nine hundred seventy-eight thousand, three hundred eighty-one".