101511579745 has 4 divisors (see below), whose sum is σ = 121813895700. Its totient is φ = 81209263792.

The previous prime is 101511579713. The next prime is 101511579751. The reversal of 101511579745 is 547975115101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 547975115101 = 277 ⋅1978249513.

It can be written as a sum of positive squares in 2 ways, for example, as 10480845376 + 91030734369 = 102376^2 + 301713^2 .

It is a cyclic number.

It is not a de Polignac number, because 101511579745 - 2⁵ = 101511579713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101511579695 and 101511579704.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10151157970 + ... + 10151157979.

It is an arithmetic number, because the mean of its divisors is an integer number (30453473925).

Almost surely, 2^101511579745 is an apocalyptic number.

It is an amenable number.

101511579745 is a deficient number, since it is larger than the sum of its proper divisors (20302315955).

101511579745 is an equidigital number, since it uses as much as digits as its factorization.

101511579745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20302315954.

The product of its (nonzero) digits is 220500, while the sum is 46.

The spelling of 101511579745 in words is "one hundred one billion, five hundred eleven million, five hundred seventy-nine thousand, seven hundred forty-five".