139730783478 has 128 divisors (see below), whose sum is σ = 348661393920. Its totient is φ = 36700231680.

The previous prime is 139730783447. The next prime is 139730783483. The reversal of 139730783478 is 874387037931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1804200 + ... + 1880052.

It is an arithmetic number, because the mean of its divisors is an integer number (2723917140).

Almost surely, 2^139730783478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139730783478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174330696960).

139730783478 is an abundant number, since it is smaller than the sum of its proper divisors (208930610442).

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

139730783478 is a wasteful number, since it uses less digits than its factorization.

139730783478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76014.

The product of its (nonzero) digits is 21337344, while the sum is 60.

The spelling of 139730783478 in words is "one hundred thirty-nine billion, seven hundred thirty million, seven hundred eighty-three thousand, four hundred seventy-eight".