3128797687954 has 4 divisors (see below), whose sum is σ = 4693196531934. Its totient is φ = 1564398843976.

The previous prime is 3128797687943. The next prime is 3128797687969. The reversal of 3128797687954 is 4597867978213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3025766317729 + 103031370225 = 1739473^2 + 320985^2 .

It is a super-2 number, since 2×3128797687954² (a number of 26 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (76) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 782199421987 + ... + 782199421990.

Almost surely, 2^{3128797687954} is an apocalyptic number.

3128797687954 is a deficient number, since it is larger than the sum of its proper divisors (1564398843980).

3128797687954 is a wasteful number, since it uses less digits than its factorization.

3128797687954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1564398843979.

The product of its digits is 1280240640, while the sum is 76.

The spelling of 3128797687954 in words is "three trillion, one hundred twenty-eight billion, seven hundred ninety-seven million, six hundred eighty-seven thousand, nine hundred fifty-four".