139838695650 has 120 divisors (see below), whose sum is σ = 408994336080. Its totient is φ = 35327651040.

The previous prime is 139838695649. The next prime is 139838695657. The reversal of 139838695650 is 56596838931.

139838695650 is a `hidden beast` number, since 1 + 3 + 9 + 8 + 3 + 8 + 69 + 565 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (139838695657) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 831684 + ... + 985583.

It is an arithmetic number, because the mean of its divisors is an integer number (3408286134).

Almost surely, 2^139838695650 is an apocalyptic number.

139838695650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139838695650 is an abundant number, since it is smaller than the sum of its proper divisors (269155640430).

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

139838695650 is a wasteful number, since it uses less digits than its factorization.

139838695650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1817310 (or 1817296 counting only the distinct ones).

The product of its (nonzero) digits is 41990400, while the sum is 63.

The spelling of 139838695650 in words is "one hundred thirty-nine billion, eight hundred thirty-eight million, six hundred ninety-five thousand, six hundred fifty".