155554641251 has 4 divisors (see below), whose sum is σ = 155665043400. Its totient is φ = 155444239104.

The previous prime is 155554641223. The next prime is 155554641317. The reversal of 155554641251 is 152146455551.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155554641251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155554841251) 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, 55198961 + ... + 55201778.

It is an arithmetic number, because the mean of its divisors is an integer number (38916260850).

Almost surely, 2^155554641251 is an apocalyptic number.

155554641251 is a deficient number, since it is larger than the sum of its proper divisors (110402149).

155554641251 is a wasteful number, since it uses less digits than its factorization.

155554641251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110402148.

The product of its digits is 600000, while the sum is 44.

The spelling of 155554641251 in words is "one hundred fifty-five billion, five hundred fifty-four million, six hundred forty-one thousand, two hundred fifty-one".