101010101856 has 48 divisors (see below), whose sum is σ = 265172827248. Its totient is φ = 33667328000.

The previous prime is 101010101851. The next prime is 101010101867. The reversal of 101010101856 is 658101010101.

It is a happy number.

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 (24).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101010101851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1420756 + ... + 1490156.

It is an arithmetic number, because the mean of its divisors is an integer number (5524433901).

Almost surely, 2^101010101856 is an apocalyptic number.

101010101856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

101010101856 is an abundant number, since it is smaller than the sum of its proper divisors (164162725392).

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

101010101856 is a wasteful number, since it uses less digits than its factorization.

101010101856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84575 (or 84567 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 24.

Adding to 101010101856 its reverse (658101010101), we get a palindrome (759111111957).

The spelling of 101010101856 in words is "one hundred one billion, ten million, one hundred one thousand, eight hundred fifty-six".