1641252876438 has 96 divisors (see below), whose sum is σ = 3857194238976. Its totient is φ = 464172291072.

The previous prime is 1641252876421. The next prime is 1641252876503. The reversal of 1641252876438 is 8346782521461.

It is a super-2 number, since 2×1641252876438² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 76996470 + ... + 77017782.

It is an arithmetic number, because the mean of its divisors is an integer number (40179106656).

Almost surely, 2^{1641252876438} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1641252876438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1928597119488).

1641252876438 is an abundant number, since it is smaller than the sum of its proper divisors (2215941362538).

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

1641252876438 is a wasteful number, since it uses less digits than its factorization.

1641252876438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23978 (or 23971 counting only the distinct ones).

The product of its digits is 15482880, while the sum is 57.

The spelling of 1641252876438 in words is "one trillion, six hundred forty-one billion, two hundred fifty-two million, eight hundred seventy-six thousand, four hundred thirty-eight".