155013342421993 has 16 divisors (see below), whose sum is σ = 174402559860480. Its totient is φ = 136538846035200.

The previous prime is 155013342421991. The next prime is 155013342421997. The reversal of 155013342421993 is 399124243310551.

It is a cyclic number.

It is not a de Polignac number, because 155013342421993 - 2¹ = 155013342421991 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155013342421993.

It is not an unprimeable number, because it can be changed into a prime (155013342421991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 796698048 + ... + 796892593.

It is an arithmetic number, because the mean of its divisors is an integer number (10900159991280).

Almost surely, 2^{155013342421993} is an apocalyptic number.

It is an amenable number.

155013342421993 is a deficient number, since it is larger than the sum of its proper divisors (19389217438487).

155013342421993 is a wasteful number, since it uses less digits than its factorization.

155013342421993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1593590928.

The product of its (nonzero) digits is 3499200, while the sum is 52.

The spelling of 155013342421993 in words is "one hundred fifty-five trillion, thirteen billion, three hundred forty-two million, four hundred twenty-one thousand, nine hundred ninety-three".