8257401081 has 12 divisors (see below), whose sum is σ = 11948549808. Its totient is φ = 5495152824.

The previous prime is 8257401073. The next prime is 8257401127. The reversal of 8257401081 is 1801047528.

8257401081 is a `hidden beast` number, since 8 + 2 + 574 + 0 + 1 + 0 + 81 = 666.

It is not a de Polignac number, because 8257401081 - 2³ = 8257401073 is a prime.

It is a super-2 number, since 2×8257401081² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8257401011) 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, 809755 + ... + 819888.

It is an arithmetic number, because the mean of its divisors is an integer number (995712484).

Almost surely, 2^8257401081 is an apocalyptic number.

It is an amenable number.

8257401081 is a deficient number, since it is larger than the sum of its proper divisors (3691148727).

8257401081 is a wasteful number, since it uses less digits than its factorization.

8257401081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630212 (or 1630209 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 8257401081 is about 90870.2430997078. The cubic root of 8257401081 is about 2021.2240629420.

The spelling of 8257401081 in words is "eight billion, two hundred fifty-seven million, four hundred one thousand, eighty-one".