155320742612 has 12 divisors (see below), whose sum is σ = 310641485280. Its totient is φ = 66566032536.

The previous prime is 155320742611. The next prime is 155320742659. The reversal of 155320742612 is 216247023551.

155320742612 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155320742611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2773584662 + ... + 2773584717.

It is an arithmetic number, because the mean of its divisors is an integer number (25886790440).

Almost surely, 2^155320742612 is an apocalyptic number.

It is an amenable number.

155320742612 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155320742612 is a wasteful number, since it uses less digits than its factorization.

155320742612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5547169390 (or 5547169388 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 38.

The spelling of 155320742612 in words is "one hundred fifty-five billion, three hundred twenty million, seven hundred forty-two thousand, six hundred twelve".