74865891870 has 384 divisors, whose sum is σ = 259808919552. Its totient is φ = 15053558400.

The previous prime is 74865891853. The next prime is 74865891907. The reversal of 74865891870 is 7819856847.

74865891870 is a `hidden beast` number, since 7 + 48 + 6 + 589 + 1 + 8 + 7 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 74865891798 and 74865891807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 5793957 + ... + 5806863.

It is an arithmetic number, because the mean of its divisors is an integer number (676585728).

Almost surely, 2^74865891870 is an apocalyptic number.

74865891870 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 74865891870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129904459776).

74865891870 is an abundant number, since it is smaller than the sum of its proper divisors (184943027682).

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

74865891870 is a wasteful number, since it uses less digits than its factorization.

74865891870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12978 (or 12966 counting only the distinct ones).

The product of its (nonzero) digits is 27095040, while the sum is 63.

The spelling of 74865891870 in words is "seventy-four billion, eight hundred sixty-five million, eight hundred ninety-one thousand, eight hundred seventy".