67216091698440 has 128 divisors (see below), whose sum is σ = 235845935856000. Its totient is φ = 16980907371264.

The previous prime is 67216091698423. The next prime is 67216091698471. The reversal of 67216091698440 is 4489619061276.

67216091698440 is a `hidden beast` number, since 6 + 7 + 2 + 1 + 609 + 16 + 9 + 8 + 4 + 4 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1637798479 + ... + 1637839518.

It is an arithmetic number, because the mean of its divisors is an integer number (1842546373875).

Almost surely, 2^{67216091698440} is an apocalyptic number.

67216091698440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

67216091698440 is an abundant number, since it is smaller than the sum of its proper divisors (168629844157560).

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

67216091698440 is a wasteful number, since it uses less digits than its factorization.

67216091698440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3275638036 (or 3275638026 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 63.

The spelling of 67216091698440 in words is "sixty-seven trillion, two hundred sixteen billion, ninety-one million, six hundred ninety-eight thousand, four hundred forty".