1664152254100 has 54 divisors (see below), whose sum is σ = 4200795773790. Its totient is φ = 570566485440.

The previous prime is 1664152253993. The next prime is 1664152254101. The reversal of 1664152254100 is 14522514661.

It can be written as a sum of positive squares in 3 ways, for example, as 3729300624 + 1660422953476 = 61068^2 + 1288574^2 .

It is a super-2 number, since 2×1664152254100² (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 1664152254100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664152254101) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 169806555 + ... + 169816354.

Almost surely, 2^{1664152254100} is an apocalyptic number.

1664152254100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1664152254100 is an abundant number, since it is smaller than the sum of its proper divisors (2536643519690).

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

1664152254100 is a wasteful number, since it uses less digits than its factorization.

1664152254100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339622937 (or 339622923 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 37.

Adding to 1664152254100 its reverse (14522514661), we get a palindrome (1678674768761).

The spelling of 1664152254100 in words is "one trillion, six hundred sixty-four billion, one hundred fifty-two million, two hundred fifty-four thousand, one hundred".