1916685276858 has 384 divisors, whose sum is σ = 4863660392448. Its totient is φ = 540101520000.

The previous prime is 1916685276773. The next prime is 1916685276859. The reversal of 1916685276858 is 8586725866191.

1916685276858 is a `hidden beast` number, since 1 + 9 + 16 + 6 + 8 + 527 + 6 + 85 + 8 = 666.

It is a super-2 number, since 2×1916685276858² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1916685276859) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 7072639263 + ... + 7072639533.

It is an arithmetic number, because the mean of its divisors is an integer number (12665782272).

Almost surely, 2^{1916685276858} is an apocalyptic number.

1916685276858 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1916685276858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2431830196224).

1916685276858 is an abundant number, since it is smaller than the sum of its proper divisors (2946975115590).

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

1916685276858 is a wasteful number, since it uses less digits than its factorization.

1916685276858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702 (or 699 counting only the distinct ones).

The product of its digits is 348364800, while the sum is 72.

The spelling of 1916685276858 in words is "one trillion, nine hundred sixteen billion, six hundred eighty-five million, two hundred seventy-six thousand, eight hundred fifty-eight".