101545520561 has 4 divisors (see below), whose sum is σ = 101650099824. Its totient is φ = 101440941300.

The previous prime is 101545520509. The next prime is 101545520567. The reversal of 101545520561 is 165025545101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 101545520561 - 2¹⁸ = 101545258417 is a prime.

It is a super-2 number, since 2×101545520561² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101545520567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52288175 + ... + 52290116.

It is an arithmetic number, because the mean of its divisors is an integer number (25412524956).

Almost surely, 2^101545520561 is an apocalyptic number.

It is an amenable number.

101545520561 is a deficient number, since it is larger than the sum of its proper divisors (104579263).

101545520561 is an equidigital number, since it uses as much as digits as its factorization.

101545520561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104579262.

The product of its (nonzero) digits is 30000, while the sum is 35.

The spelling of 101545520561 in words is "one hundred one billion, five hundred forty-five million, five hundred twenty thousand, five hundred sixty-one".