1988169660454 has 32 divisors (see below), whose sum is σ = 3015559362816. Its totient is φ = 983050891680.

The previous prime is 1988169660431. The next prime is 1988169660593. The reversal of 1988169660454 is 4540669618891.

It is a super-2 number, since 2×1988169660454² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1988169660454.

It is a congruent number.

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, 90085929 + ... + 90107995.

It is an arithmetic number, because the mean of its divisors is an integer number (94236230088).

Almost surely, 2^{1988169660454} is an apocalyptic number.

1988169660454 is a deficient number, since it is larger than the sum of its proper divisors (1027389702362).

1988169660454 is a wasteful number, since it uses less digits than its factorization.

1988169660454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23580.

The product of its (nonzero) digits is 89579520, while the sum is 67.

The spelling of 1988169660454 in words is "one trillion, nine hundred eighty-eight billion, one hundred sixty-nine million, six hundred sixty thousand, four hundred fifty-four".