139737520394 has 8 divisors (see below), whose sum is σ = 216834083460. Its totient is φ = 67459492576.

The previous prime is 139737520387. The next prime is 139737520459. The reversal of 139737520394 is 493025737931.

It can be written as a sum of positive squares in 2 ways, for example, as 123858244225 + 15879276169 = 351935^2 + 126013^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1204633739 + ... + 1204633854.

Almost surely, 2^139737520394 is an apocalyptic number.

139737520394 is a deficient number, since it is larger than the sum of its proper divisors (77096563066).

139737520394 is a wasteful number, since it uses less digits than its factorization.

139737520394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2409267624.

The product of its (nonzero) digits is 4286520, while the sum is 53.

The spelling of 139737520394 in words is "one hundred thirty-nine billion, seven hundred thirty-seven million, five hundred twenty thousand, three hundred ninety-four".