5386661581 has 12 divisors (see below), whose sum is σ = 6267938880. Its totient is φ = 4615795800.

The previous prime is 5386661569. The next prime is 5386661593. The reversal of 5386661581 is 1851666835.

It is an interprime number because it is at equal distance from previous prime (5386661569) and next prime (5386661593).

It is not a de Polignac number, because 5386661581 - 2⁹ = 5386661069 is a prime.

It is a super-2 number, since 2×5386661581² = 58032245976442839122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5386661281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 178006 + ... + 206056.

It is an arithmetic number, because the mean of its divisors is an integer number (522328240).

Almost surely, 2^5386661581 is an apocalyptic number.

It is an amenable number.

5386661581 is a deficient number, since it is larger than the sum of its proper divisors (881277299).

5386661581 is a wasteful number, since it uses less digits than its factorization.

5386661581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31984 (or 31977 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 49.

The square root of 5386661581 is about 73393.8797244021. The cubic root of 5386661581 is about 1752.9649418031.

The spelling of 5386661581 in words is "five billion, three hundred eighty-six million, six hundred sixty-one thousand, five hundred eighty-one".