155211355601 has 4 divisors (see below), whose sum is σ = 157397431104. Its totient is φ = 153025280100.

The previous prime is 155211355589. The next prime is 155211355667. The reversal of 155211355601 is 106553112551.

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, and also an emirpimes, since its reverse is a distinct semiprime: 106553112551 = 163 ⋅653700077.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155211355601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155211354601) 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, 1093037645 + ... + 1093037786.

It is an arithmetic number, because the mean of its divisors is an integer number (39349357776).

Almost surely, 2^155211355601 is an apocalyptic number.

It is an amenable number.

155211355601 is a deficient number, since it is larger than the sum of its proper divisors (2186075503).

155211355601 is an equidigital number, since it uses as much as digits as its factorization.

155211355601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2186075502.

The product of its (nonzero) digits is 22500, while the sum is 35.

The spelling of 155211355601 in words is "one hundred fifty-five billion, two hundred eleven million, three hundred fifty-five thousand, six hundred one".