155620403055 has 96 divisors (see below), whose sum is σ = 302674881600. Its totient is φ = 73438009344.

The previous prime is 155620403053. The next prime is 155620403083. The reversal of 155620403055 is 550304026551.

155620403055 is a `hidden beast` number, since 1 + 5 + 562 + 0 + 40 + 3 + 0 + 55 = 666.

It is not a de Polignac number, because 155620403055 - 2¹ = 155620403053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155620403053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2325139 + ... + 2391131.

It is an arithmetic number, because the mean of its divisors is an integer number (3152863350).

Almost surely, 2^155620403055 is an apocalyptic number.

155620403055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

155620403055 is a deficient number, since it is larger than the sum of its proper divisors (147054478545).

155620403055 is a wasteful number, since it uses less digits than its factorization.

155620403055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66185 (or 66182 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The spelling of 155620403055 in words is "one hundred fifty-five billion, six hundred twenty million, four hundred three thousand, fifty-five".