135942639615 has 96 divisors (see below), whose sum is σ = 245959549056. Its totient is φ = 69394268160.

The previous prime is 135942639587. The next prime is 135942639631. The reversal of 135942639615 is 516936249531.

135942639615 is a `hidden beast` number, since 1 + 3 + 594 + 2 + 6 + 39 + 6 + 15 = 666.

It is a Cunningham number, because it is equal to 368704²-1.

It is not a de Polignac number, because 135942639615 - 2⁶ = 135942639551 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 68209059 + ... + 68211051.

It is an arithmetic number, because the mean of its divisors is an integer number (2562078636).

Almost surely, 2^135942639615 is an apocalyptic number.

135942639615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

135942639615 is a deficient number, since it is larger than the sum of its proper divisors (110016909441).

135942639615 is a wasteful number, since it uses less digits than its factorization.

135942639615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2689 (or 2686 counting only the distinct ones).

The product of its digits is 5248800, while the sum is 54.

The spelling of 135942639615 in words is "one hundred thirty-five billion, nine hundred forty-two million, six hundred thirty-nine thousand, six hundred fifteen".