102405780851 has 8 divisors (see below), whose sum is σ = 111742516224. Its totient is φ = 93073565320.

The previous prime is 102405780821. The next prime is 102405780857. The reversal of 102405780851 is 158087504201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102405780851 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102405780799 and 102405780808.

It is not an unprimeable number, because it can be changed into a prime (102405780857) 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, 1082495 + ... + 1173288.

It is an arithmetic number, because the mean of its divisors is an integer number (13967814528).

Almost surely, 2^102405780851 is an apocalyptic number.

102405780851 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

102405780851 is a deficient number, since it is larger than the sum of its proper divisors (9336735373).

102405780851 is a wasteful number, since it uses less digits than its factorization.

102405780851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2259921.

The product of its (nonzero) digits is 89600, while the sum is 41.

The spelling of 102405780851 in words is "one hundred two billion, four hundred five million, seven hundred eighty thousand, eight hundred fifty-one".