381091427616 has 48 divisors (see below), whose sum is σ = 1014454663488. Its totient is φ = 125241312000.

The previous prime is 381091427593. The next prime is 381091427627. The reversal of 381091427616 is 616724190183.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27948835 + ... + 27962466.

It is an arithmetic number, because the mean of its divisors is an integer number (21134472156).

Almost surely, 2^381091427616 is an apocalyptic number.

It is an amenable number.

381091427616 is an abundant number, since it is smaller than the sum of its proper divisors (633363235872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

381091427616 is a wasteful number, since it uses less digits than its factorization.

381091427616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55911385 (or 55911377 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 381091427616 in words is "three hundred eighty-one billion, ninety-one million, four hundred twenty-seven thousand, six hundred sixteen".