155401700018 has 4 divisors (see below), whose sum is σ = 233102550030. Its totient is φ = 77700850008.

The previous prime is 155401699987. The next prime is 155401700081. The reversal of 155401700018 is 810007104551.

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

It can be written as a sum of positive squares in only one way, i.e., 96797521129 + 58604178889 = 311123^2 + 242083^2 .

It is a super-2 number, since 2×155401700018² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38850425003 + ... + 38850425006.

Almost surely, 2^155401700018 is an apocalyptic number.

155401700018 is a deficient number, since it is larger than the sum of its proper divisors (77700850012).

155401700018 is an equidigital number, since it uses as much as digits as its factorization.

155401700018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77700850011.

The product of its (nonzero) digits is 5600, while the sum is 32.

Adding to 155401700018 its reverse (810007104551), we get a palindrome (965408804569).

The spelling of 155401700018 in words is "one hundred fifty-five billion, four hundred one million, seven hundred thousand, eighteen".