643019215977472 has 176 divisors, whose sum is σ = 1330262529145600. Its totient is φ = 310345022177280.

The previous prime is 643019215977449. The next prime is 643019215977521. The reversal of 643019215977472 is 274779512910346.

It is a junction number, because it is equal to n+sod(n) for n = 643019215977398 and 643019215977407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21969277654 + ... + 21969306922.

Almost surely, 2^{643019215977472} is an apocalyptic number.

643019215977472 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 643019215977472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (665131264572800).

643019215977472 is an abundant number, since it is smaller than the sum of its proper divisors (687243313168128).

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

643019215977472 is a wasteful number, since it uses less digits than its factorization.

643019215977472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31062 (or 31044 counting only the distinct ones).

The product of its (nonzero) digits is 160030080, while the sum is 67.

The spelling of 643019215977472 in words is "six hundred forty-three trillion, nineteen billion, two hundred fifteen million, nine hundred seventy-seven thousand, four hundred seventy-two".