74136520146 has 48 divisors (see below), whose sum is σ = 160969610880. Its totient is φ = 22752475200.

The previous prime is 74136520127. The next prime is 74136520229. The reversal of 74136520146 is 64102563147.

It is a happy number.

It is a super-2 number, since 2×74136520146² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 300471 + ... + 488421.

It is an arithmetic number, because the mean of its divisors is an integer number (3353533560).

Almost surely, 2^74136520146 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74136520146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80484805440).

74136520146 is an abundant number, since it is smaller than the sum of its proper divisors (86833090734).

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

74136520146 is a wasteful number, since it uses less digits than its factorization.

74136520146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188371 (or 188358 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The spelling of 74136520146 in words is "seventy-four billion, one hundred thirty-six million, five hundred twenty thousand, one hundred forty-six".