50000001555 has 48 divisors (see below), whose sum is σ = 93740695200. Its totient is φ = 22690257408.

The previous prime is 50000001547. The next prime is 50000001559. The reversal of 50000001555 is 55510000005.

It is not a de Polignac number, because 50000001555 - 2³ = 50000001547 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (50000001559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 147580 + ... + 348969.

It is an arithmetic number, because the mean of its divisors is an integer number (1952931150).

Almost surely, 2^50000001555 is an apocalyptic number.

50000001555 is a deficient number, since it is larger than the sum of its proper divisors (43740693645).

50000001555 is a wasteful number, since it uses less digits than its factorization.

50000001555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496708 (or 496701 counting only the distinct ones).

The product of its (nonzero) digits is 625, while the sum is 21.

The spelling of 50000001555 in words is "fifty billion, one thousand, five hundred fifty-five".