139522446505 has 64 divisors (see below), whose sum is σ = 188701128000. Its totient is φ = 98322481152.

The previous prime is 139522446467. The next prime is 139522446527. The reversal of 139522446505 is 505644225931.

139522446505 = 264123² + 264124².

It can be written as a sum of positive squares in 32 ways, for example, as 113639106816 + 25883339689 = 337104^2 + 160883^2 .

It is a 6-Lehmer number, since φ(139522446505) divides (139522446505-1)⁶.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139522446505 is a prime.

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, 138277441 + ... + 138278449.

It is an arithmetic number, because the mean of its divisors is an integer number (2948455125).

Almost surely, 2^139522446505 is an apocalyptic number.

139522446505 is the 264124-th centered square number.

It is an amenable number.

139522446505 is a deficient number, since it is larger than the sum of its proper divisors (49178681495).

139522446505 is a wasteful number, since it uses less digits than its factorization.

139522446505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1838.

The product of its (nonzero) digits is 1296000, while the sum is 46.

The spelling of 139522446505 in words is "one hundred thirty-nine billion, five hundred twenty-two million, four hundred forty-six thousand, five hundred five".