155720410138 has 16 divisors (see below), whose sum is σ = 238146804000. Its totient is φ = 76340105296.

The previous prime is 155720410133. The next prime is 155720410169. The reversal of 155720410138 is 831014027551.

It is a super-2 number, since 2×155720410138² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 155720410097 and 155720410106.

It is not an unprimeable number, because it can be changed into a prime (155720410133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331120 + ... + 648907.

It is an arithmetic number, because the mean of its divisors is an integer number (14884175250).

Almost surely, 2^155720410138 is an apocalyptic number.

155720410138 is a deficient number, since it is larger than the sum of its proper divisors (82426393862).

155720410138 is a wasteful number, since it uses less digits than its factorization.

155720410138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981581.

The product of its (nonzero) digits is 33600, while the sum is 37.

Adding to 155720410138 its reverse (831014027551), we get a palindrome (986734437689).

The spelling of 155720410138 in words is "one hundred fifty-five billion, seven hundred twenty million, four hundred ten thousand, one hundred thirty-eight".