155540104150251 has 4 divisors (see below), whose sum is σ = 207386805533672. Its totient is φ = 103693402766832.

The previous prime is 155540104150169. The next prime is 155540104150351. The reversal of 155540104150251 is 152051401045551.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 155540104150251 - 2¹¹ = 155540104148203 is a prime.

It is a super-4 number, since 4×155540104150251⁴ (a number of 58 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155540104150351) 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, 25923350691706 + ... + 25923350691711.

It is an arithmetic number, because the mean of its divisors is an integer number (51846701383418).

Almost surely, 2^{155540104150251} is an apocalyptic number.

155540104150251 is a deficient number, since it is larger than the sum of its proper divisors (51846701383421).

155540104150251 is an equidigital number, since it uses as much as digits as its factorization.

155540104150251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51846701383420.

The product of its (nonzero) digits is 100000, while the sum is 39.

The spelling of 155540104150251 in words is "one hundred fifty-five trillion, five hundred forty billion, one hundred four million, one hundred fifty thousand, two hundred fifty-one".