381578156712 has 24 divisors (see below), whose sum is σ = 1033440841290. Its totient is φ = 127192718880.

The previous prime is 381578156699. The next prime is 381578156737. The reversal of 381578156712 is 217651875183.

381578156712 is a `hidden beast` number, since 3 + 8 + 1 + 5 + 78 + 1 + 567 + 1 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 219872836836 + 161705319876 = 468906^2 + 402126^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-3 number, since 3×381578156712³ (a number of 36 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2649848239 + ... + 2649848382.

Almost surely, 2^381578156712 is an apocalyptic number.

It is an amenable number.

381578156712 is an abundant number, since it is smaller than the sum of its proper divisors (651862684578).

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

381578156712 is a wasteful number, since it uses less digits than its factorization.

381578156712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5299696633 (or 5299696626 counting only the distinct ones).

The product of its digits is 2822400, while the sum is 54.

The spelling of 381578156712 in words is "three hundred eighty-one billion, five hundred seventy-eight million, one hundred fifty-six thousand, seven hundred twelve".