1555500494 has 4 divisors (see below), whose sum is σ = 2333250744. Its totient is φ = 777750246.

The previous prime is 1555500487. The next prime is 1555500559. The reversal of 1555500494 is 4940055551.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 388875122 + ... + 388875125.

It is an arithmetic number, because the mean of its divisors is an integer number (583312686).

Almost surely, 2^1555500494 is an apocalyptic number.

1555500494 is a deficient number, since it is larger than the sum of its proper divisors (777750250).

1555500494 is an equidigital number, since it uses as much as digits as its factorization.

1555500494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777750249.

The product of its (nonzero) digits is 90000, while the sum is 38.

The square root of 1555500494 is about 39439.8338485344. The cubic root of 1555500494 is about 1158.6618770317.

The spelling of 1555500494 in words is "one billion, five hundred fifty-five million, five hundred thousand, four hundred ninety-four".