155421456363 has 12 divisors (see below), whose sum is σ = 224768475360. Its totient is φ = 103489312176.

The previous prime is 155421456349. The next prime is 155421456373. The reversal of 155421456363 is 363654124551.

It is a happy number.

155421456363 is a `hidden beast` number, since 1 + 5 + 5 + 4 + 2 + 1 + 4 + 5 + 636 + 3 = 666.

It is not a de Polignac number, because 155421456363 - 2⁸ = 155421456107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155421456373) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10408131 + ... + 10423052.

It is an arithmetic number, because the mean of its divisors is an integer number (18730706280).

Almost surely, 2^155421456363 is an apocalyptic number.

155421456363 is a deficient number, since it is larger than the sum of its proper divisors (69347018997).

155421456363 is a wasteful number, since it uses less digits than its factorization.

155421456363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20832018 (or 20832015 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 45.

The spelling of 155421456363 in words is "one hundred fifty-five billion, four hundred twenty-one million, four hundred fifty-six thousand, three hundred sixty-three".