1671231816 has 24 divisors (see below), whose sum is σ = 4526253030. Its totient is φ = 557077248.

The previous prime is 1671231761. The next prime is 1671231839. The reversal of 1671231816 is 6181321761.

1671231816 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1063412100 + 607819716 = 32610^2 + 24654^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-3 number, since 3×1671231816³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11605705 + ... + 11605848.

Almost surely, 2^1671231816 is an apocalyptic number.

It is an amenable number.

1671231816 is an abundant number, since it is smaller than the sum of its proper divisors (2855021214).

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

1671231816 is a wasteful number, since it uses less digits than its factorization.

1671231816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23211565 (or 23211558 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 1671231816 is about 40880.7022444576. The cubic root of 1671231816 is about 1186.7126312345.

The spelling of 1671231816 in words is "one billion, six hundred seventy-one million, two hundred thirty-one thousand, eight hundred sixteen".