387281933274981 has 8 divisors (see below), whose sum is σ = 521488543816224. Its totient is φ = 255631639125200.

The previous prime is 387281933274949. The next prime is 387281933274991. The reversal of 387281933274981 is 189472339182783.

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 387281933274981 - 2⁵ = 387281933274949 is a prime.

It is a super-2 number, since 2×387281933274981² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387281933274991) 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, 639079097511 + ... + 639079098116.

It is an arithmetic number, because the mean of its divisors is an integer number (65186067977028).

Almost surely, 2^{387281933274981} is an apocalyptic number.

It is an amenable number.

387281933274981 is a deficient number, since it is larger than the sum of its proper divisors (134206610541243).

387281933274981 is a wasteful number, since it uses less digits than its factorization.

387281933274981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278158195731.

The product of its digits is 877879296, while the sum is 75.

The spelling of 387281933274981 in words is "three hundred eighty-seven trillion, two hundred eighty-one billion, nine hundred thirty-three million, two hundred seventy-four thousand, nine hundred eighty-one".