155781146512 has 20 divisors (see below), whose sum is σ = 302349084556. Its totient is φ = 77755576320.

The previous prime is 155781146503. The next prime is 155781146531. The reversal of 155781146512 is 215641187551.

It can be written as a sum of positive squares in 2 ways, for example, as 146425614336 + 9355532176 = 382656^2 + 96724^2 .

It is a super-2 number, since 2×155781146512² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8427789 + ... + 8446252.

Almost surely, 2^155781146512 is an apocalyptic number.

It is an amenable number.

155781146512 is a deficient number, since it is larger than the sum of its proper divisors (146567938044).

155781146512 is a wasteful number, since it uses less digits than its factorization.

155781146512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16874626 (or 16874620 counting only the distinct ones).

The product of its digits is 336000, while the sum is 46.

The spelling of 155781146512 in words is "one hundred fifty-five billion, seven hundred eighty-one million, one hundred forty-six thousand, five hundred twelve".