1681101690 has 32 divisors (see below), whose sum is σ = 4094867520. Its totient is φ = 441602304.

The previous prime is 1681101689. The next prime is 1681101701. The reversal of 1681101690 is 961011861.

1681101690 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1681101690² = 5652205784241712200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 416175 + ... + 420194.

It is an arithmetic number, because the mean of its divisors is an integer number (127964610).

Almost surely, 2^1681101690 is an apocalyptic number.

1681101690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1681101690 is an abundant number, since it is smaller than the sum of its proper divisors (2413765830).

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

1681101690 is a wasteful number, since it uses less digits than its factorization.

1681101690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836446.

The product of its (nonzero) digits is 2592, while the sum is 33.

The square root of 1681101690 is about 41001.2401031969. The cubic root of 1681101690 is about 1189.0441893025.

The spelling of 1681101690 in words is "one billion, six hundred eighty-one million, one hundred one thousand, six hundred ninety".