136620153016621 has 8 divisors (see below), whose sum is σ = 144658365342840. Its totient is φ = 128582133216768.

The previous prime is 136620153016579. The next prime is 136620153016691. The reversal of 136620153016621 is 126610351026631.

It can be written as a sum of positive squares in 4 ways, for example, as 90568321194121 + 46051831822500 = 9516739^2 + 6786150^2 .

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

It is not a de Polignac number, because 136620153016621 - 2³⁷ = 136482714063149 is a prime.

It is a super-2 number, since 2×136620153016621² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136620153016691) 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, 46669336 + ... + 49510273.

It is an arithmetic number, because the mean of its divisors is an integer number (18082295667855).

Almost surely, 2^{136620153016621} is an apocalyptic number.

It is an amenable number.

136620153016621 is a deficient number, since it is larger than the sum of its proper divisors (8038212326219).

136620153016621 is an equidigital number, since it uses as much as digits as its factorization.

136620153016621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96263183.

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 136620153016621 in words is "one hundred thirty-six trillion, six hundred twenty billion, one hundred fifty-three million, sixteen thousand, six hundred twenty-one".