139671235620 has 216 divisors, whose sum is σ = 506161112184. Its totient is φ = 31061947392.

The previous prime is 139671235619. The next prime is 139671235667. The reversal of 139671235620 is 26532176931.

139671235620 is a `hidden beast` number, since 1 + 3 + 9 + 6 + 7 + 12 + 3 + 5 + 620 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4337012736 + 135334222884 = 65856^2 + 367878^2 .

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 71 ways as a sum of consecutive naturals, for example, 112344 + ... + 540336.

Almost surely, 2^139671235620 is an apocalyptic number.

139671235620 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 139671235620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253080556092).

139671235620 is an abundant number, since it is smaller than the sum of its proper divisors (366489876564).

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

139671235620 is a wasteful number, since it uses less digits than its factorization.

139671235620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428059 (or 428047 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The spelling of 139671235620 in words is "one hundred thirty-nine billion, six hundred seventy-one million, two hundred thirty-five thousand, six hundred twenty".