139020779520 has 1200 divisors, whose sum is σ = 591485767488. Its totient is φ = 30576476160.

The previous prime is 139020779503. The next prime is 139020779543. The reversal of 139020779520 is 25977020931.

139020779520 is a `hidden beast` number, since 1 + 39 + 0 + 20 + 7 + 79 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1904394204 + ... + 1904394276.

Almost surely, 2^139020779520 is an apocalyptic number.

139020779520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139020779520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295742883744).

139020779520 is an abundant number, since it is smaller than the sum of its proper divisors (452464987968).

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

139020779520 is an frugal number, since it uses more digits than its factorization.

139020779520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The spelling of 139020779520 in words is "one hundred thirty-nine billion, twenty million, seven hundred seventy-nine thousand, five hundred twenty".