1661044655130 has 64 divisors (see below), whose sum is σ = 4556327977728. Its totient is φ = 379640701440.

The previous prime is 1661044655107. The next prime is 1661044655131. The reversal of 1661044655130 is 315564401661.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1661044655131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2802660 + ... + 3343200.

It is an arithmetic number, because the mean of its divisors is an integer number (71192624652).

Almost surely, 2^{1661044655130} is an apocalyptic number.

1661044655130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1661044655130 is an abundant number, since it is smaller than the sum of its proper divisors (2895283322598).

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

1661044655130 is a wasteful number, since it uses less digits than its factorization.

1661044655130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555191.

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 1661044655130 in words is "one trillion, six hundred sixty-one billion, forty-four million, six hundred fifty-five thousand, one hundred thirty".