67256405436 has 192 divisors, whose sum is σ = 178946482176. Its totient is φ = 19483027200.

The previous prime is 67256405413. The next prime is 67256405441. The reversal of 67256405436 is 63450465276.

It is a super-2 number, since 2×67256405436² (a number of 22 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 63 ways as a sum of consecutive naturals, for example, 63269841 + ... + 63270903.

It is an arithmetic number, because the mean of its divisors is an integer number (932012928).

Almost surely, 2^67256405436 is an apocalyptic number.

67256405436 is a gapful number since it is divisible by the number (66) 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 67256405436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89473241088).

67256405436 is an abundant number, since it is smaller than the sum of its proper divisors (111690076740).

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

67256405436 is a wasteful number, since it uses less digits than its factorization.

67256405436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1352 (or 1350 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 48.

The spelling of 67256405436 in words is "sixty-seven billion, two hundred fifty-six million, four hundred five thousand, four hundred thirty-six".