1693867172490 has 96 divisors (see below), whose sum is σ = 4451878319616. Its totient is φ = 446797992960.

The previous prime is 1693867172489. The next prime is 1693867172533. The reversal of 1693867172490 is 942717683961.

1693867172490 is a `hidden beast` number, since 1 + 6 + 9 + 3 + 8 + 6 + 71 + 72 + 490 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16281979 + ... + 16385681.

It is an arithmetic number, because the mean of its divisors is an integer number (46373732496).

Almost surely, 2^{1693867172490} is an apocalyptic number.

1693867172490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1693867172490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2225939159808).

1693867172490 is an abundant number, since it is smaller than the sum of its proper divisors (2758011147126).

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

1693867172490 is a wasteful number, since it uses less digits than its factorization.

1693867172490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105684 (or 105681 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 63.

The spelling of 1693867172490 in words is "one trillion, six hundred ninety-three billion, eight hundred sixty-seven million, one hundred seventy-two thousand, four hundred ninety".