1555641061 has 16 divisors (see below), whose sum is σ = 1742406400. Its totient is φ = 1379446848.

The previous prime is 1555641053. The next prime is 1555641067. The reversal of 1555641061 is 1601465551.

It is not a de Polignac number, because 1555641061 - 2³ = 1555641053 is a prime.

It is a super-2 number, since 2×1555641061² = 4840038221338411442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555641067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17530 + ... + 58468.

It is an arithmetic number, because the mean of its divisors is an integer number (108900400).

Almost surely, 2^1555641061 is an apocalyptic number.

It is an amenable number.

1555641061 is a deficient number, since it is larger than the sum of its proper divisors (186765339).

1555641061 is a wasteful number, since it uses less digits than its factorization.

1555641061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41068.

The product of its (nonzero) digits is 18000, while the sum is 34.

The square root of 1555641061 is about 39441.6158517878. The cubic root of 1555641061 is about 1158.6967778496.

The spelling of 1555641061 in words is "one billion, five hundred fifty-five million, six hundred forty-one thousand, sixty-one".