1661654053122 has 32 divisors (see below), whose sum is σ = 4021482079872. Its totient is φ = 446831341824.

The previous prime is 1661654053109. The next prime is 1661654053153. The reversal of 1661654053122 is 2213504561661.

It is a super-2 number, since 2×1661654053122² (a number of 25 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1163622573 + ... + 1163624000.

It is an arithmetic number, because the mean of its divisors is an integer number (125671314996).

Almost surely, 2^{1661654053122} is an apocalyptic number.

1661654053122 is an abundant number, since it is smaller than the sum of its proper divisors (2359828026750).

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

1661654053122 is a wasteful number, since it uses less digits than its factorization.

1661654053122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2327246602.

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

The spelling of 1661654053122 in words is "one trillion, six hundred sixty-one billion, six hundred fifty-four million, fifty-three thousand, one hundred twenty-two".