381594065691 has 16 divisors (see below), whose sum is σ = 517674421760. Its totient is φ = 249985401120.

The previous prime is 381594065651. The next prime is 381594065693. The reversal of 381594065691 is 196560495183.

It is not a de Polignac number, because 381594065691 - 2¹⁹ = 381593541403 is a prime.

It is a super-2 number, since 2×381594065691² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381594065693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3765400 + ... + 3865413.

It is an arithmetic number, because the mean of its divisors is an integer number (32354651360).

Almost surely, 2^381594065691 is an apocalyptic number.

381594065691 is a deficient number, since it is larger than the sum of its proper divisors (136080356069).

381594065691 is a wasteful number, since it uses less digits than its factorization.

381594065691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7631106.

The product of its (nonzero) digits is 6998400, while the sum is 57.

The spelling of 381594065691 in words is "three hundred eighty-one billion, five hundred ninety-four million, sixty-five thousand, six hundred ninety-one".