155420429393 has 8 divisors (see below), whose sum is σ = 156564195528. Its totient is φ = 154276798464.

The previous prime is 155420429371. The next prime is 155420429429. The reversal of 155420429393 is 393924024551.

It can be written as a sum of positive squares in 4 ways, for example, as 21270544 + 155399158849 = 4612^2 + 394207^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155420429393 - 2²² = 155416235089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155420429323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4348805 + ... + 4384397.

It is an arithmetic number, because the mean of its divisors is an integer number (19570524441).

Almost surely, 2^155420429393 is an apocalyptic number.

It is an amenable number.

155420429393 is a deficient number, since it is larger than the sum of its proper divisors (1143766135).

155420429393 is a wasteful number, since it uses less digits than its factorization.

155420429393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67603.

The product of its (nonzero) digits is 1166400, while the sum is 47.

The spelling of 155420429393 in words is "one hundred fifty-five billion, four hundred twenty million, four hundred twenty-nine thousand, three hundred ninety-three".