1671461520444 has 36 divisors (see below), whose sum is σ = 4227932433816. Its totient is φ = 556778128608.

The previous prime is 1671461520439. The next prime is 1671461520451. The reversal of 1671461520444 is 4440251641761.

1671461520444 is a `hidden beast` number, since 1 + 6 + 7 + 1 + 4 + 615 + 20 + 4 + 4 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1671461520444² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1671461520444.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15600519 + ... + 15707294.

It is an arithmetic number, because the mean of its divisors is an integer number (117442567606).

Almost surely, 2^{1671461520444} is an apocalyptic number.

It is an amenable number.

1671461520444 is an abundant number, since it is smaller than the sum of its proper divisors (2556470913372).

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

1671461520444 is a wasteful number, since it uses less digits than its factorization.

1671461520444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31309306 (or 31309301 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 1671461520444 in words is "one trillion, six hundred seventy-one billion, four hundred sixty-one million, five hundred twenty thousand, four hundred forty-four".