155681012 has 6 divisors (see below), whose sum is σ = 272441778. Its totient is φ = 77840504.

The previous prime is 155680991. The next prime is 155681017. The reversal of 155681012 is 210186551.

It can be written as a sum of positive squares in only one way, i.e., 87684496 + 67996516 = 9364^2 + 8246^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155681017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19460123 + ... + 19460130.

It is an arithmetic number, because the mean of its divisors is an integer number (45406963).

Almost surely, 2^155681012 is an apocalyptic number.

It is an amenable number.

155681012 is a deficient number, since it is larger than the sum of its proper divisors (116760766).

155681012 is a wasteful number, since it uses less digits than its factorization.

155681012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38920257 (or 38920255 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 29.

The square root of 155681012 is about 12477.2197223580. The cubic root of 155681012 is about 537.9540919815.

The spelling of 155681012 in words is "one hundred fifty-five million, six hundred eighty-one thousand, twelve".