67494435840 has 924 divisors, whose sum is σ = 265316402664. Its totient is φ = 16458743808.

The previous prime is 67494435829. The next prime is 67494435863. The reversal of 67494435840 is 4853449476.

67494435840 is a `hidden beast` number, since 67 + 494 + 4 + 3 + 58 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 630789067 + ... + 630789173.

Almost surely, 2^67494435840 is an apocalyptic number.

67494435840 is a gapful number since it is divisible by the number (60) 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 67494435840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132658201332).

67494435840 is an abundant number, since it is smaller than the sum of its proper divisors (197821966824).

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

67494435840 is a wasteful number, since it uses less digits than its factorization.

67494435840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 54.

The spelling of 67494435840 in words is "sixty-seven billion, four hundred ninety-four million, four hundred thirty-five thousand, eight hundred forty".