155115004004 has 6 divisors (see below), whose sum is σ = 271451257014. Its totient is φ = 77557502000.

The previous prime is 155115003991. The next prime is 155115004013. The reversal of 155115004004 is 400400511551.

It can be written as a sum of positive squares in only one way, i.e., 124524294400 + 30590709604 = 352880^2 + 174902^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19389375497 + ... + 19389375504.

It is an arithmetic number, because the mean of its divisors is an integer number (45241876169).

Almost surely, 2^155115004004 is an apocalyptic number.

It is an amenable number.

155115004004 is a deficient number, since it is larger than the sum of its proper divisors (116336253010).

155115004004 is a wasteful number, since it uses less digits than its factorization.

155115004004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38778751005 (or 38778751003 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 26.

Adding to 155115004004 its reverse (400400511551), we get a palindrome (555515515555).

The spelling of 155115004004 in words is "one hundred fifty-five billion, one hundred fifteen million, four thousand, four".