101580207557 has 4 divisors (see below), whose sum is σ = 101586310176. Its totient is φ = 101574104940.

The previous prime is 101580207511. The next prime is 101580207563. The reversal of 101580207557 is 755702085101.

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 101580207557 - 2²⁶ = 101513098693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101580207577) 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, 3026273 + ... + 3059654.

It is an arithmetic number, because the mean of its divisors is an integer number (25396577544).

Almost surely, 2^101580207557 is an apocalyptic number.

It is an amenable number.

101580207557 is a deficient number, since it is larger than the sum of its proper divisors (6102619).

101580207557 is an equidigital number, since it uses as much as digits as its factorization.

101580207557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6102618.

The product of its (nonzero) digits is 98000, while the sum is 41.

The spelling of 101580207557 in words is "one hundred one billion, five hundred eighty million, two hundred seven thousand, five hundred fifty-seven".