381018658648 has 8 divisors (see below), whose sum is σ = 714409984980. Its totient is φ = 190509329320.

The previous prime is 381018658639. The next prime is 381018658687. The reversal of 381018658648 is 846856810183.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×381018658648² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 381018658592 and 381018658601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23813666158 + ... + 23813666173.

Almost surely, 2^381018658648 is an apocalyptic number.

It is an amenable number.

381018658648 is a deficient number, since it is larger than the sum of its proper divisors (333391326332).

381018658648 is a wasteful number, since it uses less digits than its factorization.

381018658648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47627332337 (or 47627332333 counting only the distinct ones).

The product of its (nonzero) digits is 8847360, while the sum is 58.

The spelling of 381018658648 in words is "three hundred eighty-one billion, eighteen million, six hundred fifty-eight thousand, six hundred forty-eight".