1680696851715 has 32 divisors (see below), whose sum is σ = 3414749160960. Its totient is φ = 768318560352.

The previous prime is 1680696851711. The next prime is 1680696851783. The reversal of 1680696851715 is 5171586960861.

1680696851715 is a `hidden beast` number, since 16 + 8 + 0 + 6 + 96 + 8 + 517 + 15 = 666.

It is not a de Polignac number, because 1680696851715 - 2² = 1680696851711 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (1680696851711) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 889256649 + ... + 889258538.

It is an arithmetic number, because the mean of its divisors is an integer number (106710911280).

Almost surely, 2^{1680696851715} is an apocalyptic number.

1680696851715 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1680696851715 is an abundant number, since it is smaller than the sum of its proper divisors (1734052309245).

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

1680696851715 is a wasteful number, since it uses less digits than its factorization.

1680696851715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1778515208 (or 1778515202 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 63.

The spelling of 1680696851715 in words is "one trillion, six hundred eighty billion, six hundred ninety-six million, eight hundred fifty-one thousand, seven hundred fifteen".