155550536261 has 2 divisors, whose sum is σ = 155550536262. Its totient is φ = 155550536260.

The previous prime is 155550536249. The next prime is 155550536381. The reversal of 155550536261 is 162635055551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140545511236 + 15005025025 = 374894^2 + 122495^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155550536261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155550533261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77775268130 + 77775268131.

It is an arithmetic number, because the mean of its divisors is an integer number (77775268131).

Almost surely, 2^155550536261 is an apocalyptic number.

It is an amenable number.

155550536261 is a deficient number, since it is larger than the sum of its proper divisors (1).

155550536261 is an equidigital number, since it uses as much as digits as its factorization.

155550536261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 675000, while the sum is 44.

The spelling of 155550536261 in words is "one hundred fifty-five billion, five hundred fifty million, five hundred thirty-six thousand, two hundred sixty-one".