16121527153261 has 4 divisors (see below), whose sum is σ = 16970028582400. Its totient is φ = 15273025724124.

The previous prime is 16121527153243. The next prime is 16121527153327. The reversal of 16121527153261 is 16235172512161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16121527153261 - 2¹⁵ = 16121527120493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16121527153201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 424250714541 + ... + 424250714578.

It is an arithmetic number, because the mean of its divisors is an integer number (4242507145600).

Almost surely, 2^{16121527153261} is an apocalyptic number.

It is an amenable number.

16121527153261 is a deficient number, since it is larger than the sum of its proper divisors (848501429139).

16121527153261 is an equidigital number, since it uses as much as digits as its factorization.

16121527153261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848501429138.

The product of its digits is 151200, while the sum is 43.

The spelling of 16121527153261 in words is "sixteen trillion, one hundred twenty-one billion, five hundred twenty-seven million, one hundred fifty-three thousand, two hundred sixty-one".