74447139690 has 768 divisors, whose sum is σ = 270114324480. Its totient is φ = 14285134080.

The previous prime is 74447139677. The next prime is 74447139707. The reversal of 74447139690 is 9693174447.

74447139690 is a `hidden beast` number, since 7 + 4 + 447 + 139 + 69 + 0 = 666.

It is a super-2 number, since 2×74447139690² (a number of 23 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 152868627 + ... + 152869113.

It is an arithmetic number, because the mean of its divisors is an integer number (351711360).

Almost surely, 2^74447139690 is an apocalyptic number.

74447139690 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 74447139690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135057162240).

74447139690 is an abundant number, since it is smaller than the sum of its proper divisors (195667184790).

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

74447139690 is a wasteful number, since it uses less digits than its factorization.

74447139690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589 (or 577 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 54.

The spelling of 74447139690 in words is "seventy-four billion, four hundred forty-seven million, one hundred thirty-nine thousand, six hundred ninety".