135747653442621 has 16 divisors (see below), whose sum is σ = 197473162291200. Its totient is φ = 82262125945520.

The previous prime is 135747653442619. The next prime is 135747653442673. The reversal of 135747653442621 is 126244356747531.

It is a cyclic number.

It is not a de Polignac number, because 135747653442621 - 2¹ = 135747653442619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135747653442601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229179021 + ... + 229770578.

It is an arithmetic number, because the mean of its divisors is an integer number (12342072643200).

Almost surely, 2^{135747653442621} is an apocalyptic number.

135747653442621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

135747653442621 is a deficient number, since it is larger than the sum of its proper divisors (61725508848579).

135747653442621 is a wasteful number, since it uses less digits than its factorization.

135747653442621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458958576.

The product of its digits is 101606400, while the sum is 60.

The spelling of 135747653442621 in words is "one hundred thirty-five trillion, seven hundred forty-seven billion, six hundred fifty-three million, four hundred forty-two thousand, six hundred twenty-one".