1685122951340 has 12 divisors (see below), whose sum is σ = 3538758197856. Its totient is φ = 674049180528.

The previous prime is 1685122951339. The next prime is 1685122951427. The reversal of 1685122951340 is 431592215861.

It is a super-2 number, since 2×1685122951340² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42128073764 + ... + 42128073803.

It is an arithmetic number, because the mean of its divisors is an integer number (294896516488).

Almost surely, 2^{1685122951340} is an apocalyptic number.

1685122951340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1685122951340 is an abundant number, since it is smaller than the sum of its proper divisors (1853635246516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1685122951340 is a wasteful number, since it uses less digits than its factorization.

1685122951340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84256147576 (or 84256147574 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 47.

The spelling of 1685122951340 in words is "one trillion, six hundred eighty-five billion, one hundred twenty-two million, nine hundred fifty-one thousand, three hundred forty".