1643514123948 has 24 divisors (see below), whose sum is σ = 3835169866752. Its totient is φ = 547794673104.

The previous prime is 1643514123943. The next prime is 1643514123967. The reversal of 1643514123948 is 8493214153461.

It is a super-2 number, since 2×1643514123948² (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 1643514123948.

It is not an unprimeable number, because it can be changed into a prime (1643514123943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5262940 + ... + 5566467.

It is an arithmetic number, because the mean of its divisors is an integer number (159798744448).

Almost surely, 2^{1643514123948} is an apocalyptic number.

It is an amenable number.

1643514123948 is an abundant number, since it is smaller than the sum of its proper divisors (2191655742804).

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

1643514123948 is a wasteful number, since it uses less digits than its factorization.

1643514123948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10842061 (or 10842059 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 51.

The spelling of 1643514123948 in words is "one trillion, six hundred forty-three billion, five hundred fourteen million, one hundred twenty-three thousand, nine hundred forty-eight".