67732451640 has 256 divisors, whose sum is σ = 259459200000. Its totient is φ = 15395857920.

The previous prime is 67732451627. The next prime is 67732451693. The reversal of 67732451640 is 4615423776.

67732451640 is a `hidden beast` number, since 6 + 7 + 73 + 24 + 516 + 40 = 666.

67732451640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 1343611 + ... + 1393109.

It is an arithmetic number, because the mean of its divisors is an integer number (1013512500).

Almost surely, 2^67732451640 is an apocalyptic number.

67732451640 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 67732451640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129729600000).

67732451640 is an abundant number, since it is smaller than the sum of its proper divisors (191726748360).

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

67732451640 is a wasteful number, since it uses less digits than its factorization.

67732451640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49707 (or 49697 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The spelling of 67732451640 in words is "sixty-seven billion, seven hundred thirty-two million, four hundred fifty-one thousand, six hundred forty".