70121833920 has 224 divisors, whose sum is σ = 261926222400. Its totient is φ = 17599168512.

The previous prime is 70121833913. The next prime is 70121833949. The reversal of 70121833920 is 2933812107.

70121833920 is a `hidden beast` number, since 70 + 121 + 83 + 392 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91825 + ... + 385584.

Almost surely, 2^70121833920 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 70121833920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130963111200).

70121833920 is an abundant number, since it is smaller than the sum of its proper divisors (191804388480).

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

70121833920 is a wasteful number, since it uses less digits than its factorization.

70121833920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477452 (or 477436 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The spelling of 70121833920 in words is "seventy billion, one hundred twenty-one million, eight hundred thirty-three thousand, nine hundred twenty".