1810016489947 has 4 divisors (see below), whose sum is σ = 1817526932056. Its totient is φ = 1802506047840.

The previous prime is 1810016489933. The next prime is 1810016489977. The reversal of 1810016489947 is 7499846100181.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1810016489947 - 2⁷ = 1810016489819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1810016489891 and 1810016489900.

It is not an unprimeable number, because it can be changed into a prime (1810016489977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3755220693 + ... + 3755221174.

It is an arithmetic number, because the mean of its divisors is an integer number (454381733014).

Almost surely, 2^{1810016489947} is an apocalyptic number.

1810016489947 is a deficient number, since it is larger than the sum of its proper divisors (7510442109).

1810016489947 is an equidigital number, since it uses as much as digits as its factorization.

1810016489947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7510442108.

The product of its (nonzero) digits is 3483648, while the sum is 58.

The spelling of 1810016489947 in words is "one trillion, eight hundred ten billion, sixteen million, four hundred eighty-nine thousand, nine hundred forty-seven".