155450527750649 has 4 divisors (see below), whose sum is σ = 155450599121664. Its totient is φ = 155450456379636.

The previous prime is 155450527750613. The next prime is 155450527750667. The reversal of 155450527750649 is 946057725054551.

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 155450527750649 - 2²⁰ = 155450526702073 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (155450527750949) 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, 32312117 + ... + 36809970.

It is an arithmetic number, because the mean of its divisors is an integer number (38862649780416).

Almost surely, 2^{155450527750649} is an apocalyptic number.

It is an amenable number.

155450527750649 is a deficient number, since it is larger than the sum of its proper divisors (71371015).

155450527750649 is an equidigital number, since it uses as much as digits as its factorization.

155450527750649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71371014.

The product of its (nonzero) digits is 264600000, while the sum is 65.

The spelling of 155450527750649 in words is "one hundred fifty-five trillion, four hundred fifty billion, five hundred twenty-seven million, seven hundred fifty thousand, six hundred forty-nine".