136990638087 has 8 divisors (see below), whose sum is σ = 182803538304. Its totient is φ = 91252414968.

The previous prime is 136990638073. The next prime is 136990638089. The reversal of 136990638087 is 780836099631.

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

It is not a de Polignac number, because 136990638087 - 2⁶ = 136990638023 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 136990638087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136990638089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18664993 + ... + 18672330.

It is an arithmetic number, because the mean of its divisors is an integer number (22850442288).

Almost surely, 2^136990638087 is an apocalyptic number.

136990638087 is a deficient number, since it is larger than the sum of its proper divisors (45812900217).

136990638087 is a wasteful number, since it uses less digits than its factorization.

136990638087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37338549.

The product of its (nonzero) digits is 11757312, while the sum is 60.

The spelling of 136990638087 in words is "one hundred thirty-six billion, nine hundred ninety million, six hundred thirty-eight thousand, eighty-seven".