67899505408 has 108 divisors (see below), whose sum is σ = 157828028232. Its totient is φ = 29069107200.

The previous prime is 67899505393. The next prime is 67899505447. The reversal of 67899505408 is 80450599876.

It is a super-2 number, since 2×67899505408² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15063091 + ... + 15067597.

Almost surely, 2^67899505408 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 67899505408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78914014116).

67899505408 is an abundant number, since it is smaller than the sum of its proper divisors (89928522824).

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

67899505408 is a wasteful number, since it uses less digits than its factorization.

67899505408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5738 (or 5717 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 61.

The spelling of 67899505408 in words is "sixty-seven billion, eight hundred ninety-nine million, five hundred five thousand, four hundred eight".