1006461621555 has 16 divisors (see below), whose sum is σ = 1734210794400. Its totient is φ = 495488798208.

The previous prime is 1006461621533. The next prime is 1006461621559. The reversal of 1006461621555 is 5551261646001.

It is not a de Polignac number, because 1006461621555 - 2⁹ = 1006461621043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1006461621559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2580670630 + ... + 2580671019.

It is an arithmetic number, because the mean of its divisors is an integer number (108388174650).

Almost surely, 2^{1006461621555} is an apocalyptic number.

1006461621555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1006461621555 is a deficient number, since it is larger than the sum of its proper divisors (727749172845).

1006461621555 is a wasteful number, since it uses less digits than its factorization.

1006461621555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5161341670.

The product of its (nonzero) digits is 216000, while the sum is 42.

The spelling of 1006461621555 in words is "one trillion, six billion, four hundred sixty-one million, six hundred twenty-one thousand, five hundred fifty-five".