1555161398 has 16 divisors (see below), whose sum is σ = 2666908320. Its totient is φ = 666268416.

The previous prime is 1555161367. The next prime is 1555161401. The reversal of 1555161398 is 8931615551.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26840 + ... + 61892.

It is an arithmetic number, because the mean of its divisors is an integer number (166681770).

Almost surely, 2^1555161398 is an apocalyptic number.

1555161398 is a deficient number, since it is larger than the sum of its proper divisors (1111746922).

1555161398 is a wasteful number, since it uses less digits than its factorization.

1555161398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38231.

The product of its digits is 162000, while the sum is 44.

The square root of 1555161398 is about 39435.5347117292. The cubic root of 1555161398 is about 1158.5776755881.

The spelling of 1555161398 in words is "one billion, five hundred fifty-five million, one hundred sixty-one thousand, three hundred ninety-eight".