155251720712 has 48 divisors (see below), whose sum is σ = 320055487920. Its totient is φ = 70549249760.

The previous prime is 155251720643. The next prime is 155251720721. The reversal of 155251720712 is 217027152551.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3777023 + ... + 3817905.

It is an arithmetic number, because the mean of its divisors is an integer number (6667822665).

Almost surely, 2^155251720712 is an apocalyptic number.

It is an amenable number.

155251720712 is an abundant number, since it is smaller than the sum of its proper divisors (164803767208).

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

155251720712 is a wasteful number, since it uses less digits than its factorization.

155251720712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44834 (or 44819 counting only the distinct ones).

The product of its (nonzero) digits is 49000, while the sum is 38.

The spelling of 155251720712 in words is "one hundred fifty-five billion, two hundred fifty-one million, seven hundred twenty thousand, seven hundred twelve".