135512561615 has 32 divisors (see below), whose sum is σ = 178894033920. Its totient is φ = 98085993984.

The previous prime is 135512561581. The next prime is 135512561621. The reversal of 135512561615 is 516165215531.

It is not a de Polignac number, because 135512561615 - 2¹⁶ = 135512496079 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1365767 + ... + 1461623.

It is an arithmetic number, because the mean of its divisors is an integer number (5590438560).

Almost surely, 2^135512561615 is an apocalyptic number.

135512561615 is a deficient number, since it is larger than the sum of its proper divisors (43381472305).

135512561615 is a wasteful number, since it uses less digits than its factorization.

135512561615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96551.

The product of its digits is 135000, while the sum is 41.

The spelling of 135512561615 in words is "one hundred thirty-five billion, five hundred twelve million, five hundred sixty-one thousand, six hundred fifteen".