378993091772861 has 8 divisors (see below), whose sum is σ = 388001079427104. Its totient is φ = 369993931156080.

The previous prime is 378993091772833. The next prime is 378993091772879. The reversal of 378993091772861 is 168277190399873.

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 378993091772861 - 2³⁸ = 378718213865917 is a prime.

It is a super-2 number, since 2×378993091772861² (a number of 30 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 (378993096772861) 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, 2206672475 + ... + 2206844216.

It is an arithmetic number, because the mean of its divisors is an integer number (48500134928388).

Almost surely, 2^{378993091772861} is an apocalyptic number.

It is an amenable number.

378993091772861 is a deficient number, since it is larger than the sum of its proper divisors (9007987654243).

378993091772861 is a wasteful number, since it uses less digits than its factorization.

378993091772861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4413518731.

The product of its (nonzero) digits is 1728324864, while the sum is 80.

The spelling of 378993091772861 in words is "three hundred seventy-eight trillion, nine hundred ninety-three billion, ninety-one million, seven hundred seventy-two thousand, eight hundred sixty-one".