65149405398 has 216 divisors, whose sum is σ = 181480224744. Its totient is φ = 16828922880.

The previous prime is 65149405381. The next prime is 65149405411. The reversal of 65149405398 is 89350494156.

65149405398 is a `hidden beast` number, since 6 + 5 + 14 + 94 + 0 + 539 + 8 = 666.

65149405398 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 20595765 + ... + 20598927.

Almost surely, 2^65149405398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65149405398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90740112372).

65149405398 is an abundant number, since it is smaller than the sum of its proper divisors (116330819346).

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

65149405398 is a wasteful number, since it uses less digits than its factorization.

65149405398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3400 (or 3379 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 54.

The spelling of 65149405398 in words is "sixty-five billion, one hundred forty-nine million, four hundred five thousand, three hundred ninety-eight".