1205172551562 has 16 divisors (see below), whose sum is σ = 2754680117952. Its totient is φ = 344335014720.

The previous prime is 1205172551549. The next prime is 1205172551581. The reversal of 1205172551562 is 2651552715021.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 28694584561 = 1205172551562 / (1 + 2 + 0 + 5 + 1 + 7 + 2 + 5 + 5 + 1 + 5 + 6 + 2).

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, 14347292239 + ... + 14347292322.

It is an arithmetic number, because the mean of its divisors is an integer number (172167507372).

Almost surely, 2^{1205172551562} is an apocalyptic number.

1205172551562 is an abundant number, since it is smaller than the sum of its proper divisors (1549507566390).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1205172551562 is a wasteful number, since it uses less digits than its factorization.

1205172551562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28694584573.

The product of its (nonzero) digits is 210000, while the sum is 42.

The spelling of 1205172551562 in words is "one trillion, two hundred five billion, one hundred seventy-two million, five hundred fifty-one thousand, five hundred sixty-two".