1671619251664 has 40 divisors (see below), whose sum is σ = 3266706944160. Its totient is φ = 828628096128.

The previous prime is 1671619251661. The next prime is 1671619251697. The reversal of 1671619251664 is 4661529161761.

It is a super-2 number, since 2×1671619251664² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1671619251661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44974 + ... + 1829005.

It is an arithmetic number, because the mean of its divisors is an integer number (81667673604).

Almost surely, 2^{1671619251664} is an apocalyptic number.

It is an amenable number.

1671619251664 is a deficient number, since it is larger than the sum of its proper divisors (1595087692496).

1671619251664 is a wasteful number, since it uses less digits than its factorization.

1671619251664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1874467 (or 1874461 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 55.

The spelling of 1671619251664 in words is "one trillion, six hundred seventy-one billion, six hundred nineteen million, two hundred fifty-one thousand, six hundred sixty-four".