101861578847 has 4 divisors (see below), whose sum is σ = 116413232976. Its totient is φ = 87309924720.

The previous prime is 101861578781. The next prime is 101861578853. The reversal of 101861578847 is 748875168101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 748875168101 = 113 ⋅6627213877.

It is a cyclic number.

It is not a de Polignac number, because 101861578847 - 2²² = 101857384543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101861578792 and 101861578801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101861578867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7275827054 + ... + 7275827067.

It is an arithmetic number, because the mean of its divisors is an integer number (29103308244).

Almost surely, 2^101861578847 is an apocalyptic number.

101861578847 is a deficient number, since it is larger than the sum of its proper divisors (14551654129).

101861578847 is an equidigital number, since it uses as much as digits as its factorization.

101861578847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14551654128.

The product of its (nonzero) digits is 3010560, while the sum is 56.

The spelling of 101861578847 in words is "one hundred one billion, eight hundred sixty-one million, five hundred seventy-eight thousand, eight hundred forty-seven".