1551100221604 has 12 divisors (see below), whose sum is σ = 2729422214428. Its totient is φ = 771265303200.

The previous prime is 1551100221599. The next prime is 1551100221647. The reversal of 1551100221604 is 4061220011551.

It can be written as a sum of positive squares in 2 ways, for example, as 358094528100 + 1193005693504 = 598410^2 + 1092248^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1071201087 + ... + 1071202534.

Almost surely, 2^{1551100221604} is an apocalyptic number.

It is an amenable number.

1551100221604 is a deficient number, since it is larger than the sum of its proper divisors (1178321992824).

1551100221604 is a wasteful number, since it uses less digits than its factorization.

1551100221604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2142403806 (or 2142403804 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 28.

The spelling of 1551100221604 in words is "one trillion, five hundred fifty-one billion, one hundred million, two hundred twenty-one thousand, six hundred four".