1687478117740 has 24 divisors (see below), whose sum is σ = 3543734047392. Its totient is φ = 674985532800.

The previous prime is 1687478117669. The next prime is 1687478117779. The reversal of 1687478117740 is 477118747861.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2704552 + ... + 3269488.

It is an arithmetic number, because the mean of its divisors is an integer number (147655585308).

Almost surely, 2^{1687478117740} is an apocalyptic number.

1687478117740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1687478117740 is an abundant number, since it is smaller than the sum of its proper divisors (1856255929652).

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

1687478117740 is a wasteful number, since it uses less digits than its factorization.

1687478117740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714297 (or 714295 counting only the distinct ones).

The product of its (nonzero) digits is 14751744, while the sum is 61.

The spelling of 1687478117740 in words is "one trillion, six hundred eighty-seven billion, four hundred seventy-eight million, one hundred seventeen thousand, seven hundred forty".