102520771561 has 8 divisors (see below), whose sum is σ = 110558861504. Its totient is φ = 94504378320.

The previous prime is 102520771541. The next prime is 102520771567. The reversal of 102520771561 is 165177025201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102520771561 - 2⁷ = 102520771433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102520771561.

It is not an unprimeable number, because it can be changed into a prime (102520771567) 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, 5414355 + ... + 5433256.

It is an arithmetic number, because the mean of its divisors is an integer number (13819857688).

Almost surely, 2^102520771561 is an apocalyptic number.

It is an amenable number.

102520771561 is a deficient number, since it is larger than the sum of its proper divisors (8038089943).

102520771561 is a wasteful number, since it uses less digits than its factorization.

102520771561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10848351.

The product of its (nonzero) digits is 29400, while the sum is 37.

Adding to 102520771561 its reverse (165177025201), we get a palindrome (267697796762).

The spelling of 102520771561 in words is "one hundred two billion, five hundred twenty million, seven hundred seventy-one thousand, five hundred sixty-one".