67790191872 has 144 divisors (see below), whose sum is σ = 197966861568. Its totient is φ = 20464803840.

The previous prime is 67790191849. The next prime is 67790191879. The reversal of 67790191872 is 27819109776.

It is a super-2 number, since 2×67790191872² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67790191879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 465097 + ... + 593207.

It is an arithmetic number, because the mean of its divisors is an integer number (1374769872).

Almost surely, 2^67790191872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67790191872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98983430784).

67790191872 is an abundant number, since it is smaller than the sum of its proper divisors (130176669696).

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

67790191872 is a wasteful number, since it uses less digits than its factorization.

67790191872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128196 (or 128182 counting only the distinct ones).

The product of its (nonzero) digits is 2667168, while the sum is 57.

The spelling of 67790191872 in words is "sixty-seven billion, seven hundred ninety million, one hundred ninety-one thousand, eight hundred seventy-two".