69645090816 has 840 divisors, whose sum is σ = 257863183200. Its totient is φ = 18728091648.

The previous prime is 69645090803. The next prime is 69645090829. The reversal of 69645090816 is 61809054696.

It is a happy number.

69645090816 is a `hidden beast` number, since 6 + 96 + 450 + 90 + 8 + 16 = 666.

It is an interprime number because it is at equal distance from previous prime (69645090803) and next prime (69645090829).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 4096770040 + ... + 4096770056.

It is an arithmetic number, because the mean of its divisors is an integer number (306979980).

Almost surely, 2^69645090816 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 69645090816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128931591600).

69645090816 is an abundant number, since it is smaller than the sum of its proper divisors (188218092384).

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

69645090816 is an frugal number, since it uses more digits than its factorization.

69645090816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 29 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The spelling of 69645090816 in words is "sixty-nine billion, six hundred forty-five million, ninety thousand, eight hundred sixteen".