102540314461 has 4 divisors (see below), whose sum is σ = 110428030972. Its totient is φ = 94652597952.

The previous prime is 102540314447. The next prime is 102540314531. The reversal of 102540314461 is 164413045201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 164413045201 = 195203 ⋅842267.

It can be written as a sum of positive squares in 2 ways, for example, as 53884336900 + 48655977561 = 232130^2 + 220581^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102540314461 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 (102540315461) 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, 3943858236 + ... + 3943858261.

It is an arithmetic number, because the mean of its divisors is an integer number (27607007743).

Almost surely, 2^102540314461 is an apocalyptic number.

It is an amenable number.

102540314461 is a deficient number, since it is larger than the sum of its proper divisors (7887716511).

102540314461 is an equidigital number, since it uses as much as digits as its factorization.

102540314461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7887716510.

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 102540314461 its reverse (164413045201), we get a palindrome (266953359662).

The spelling of 102540314461 in words is "one hundred two billion, five hundred forty million, three hundred fourteen thousand, four hundred sixty-one".