487661578237321 has 4 divisors (see below), whose sum is σ = 489685070263444. Its totient is φ = 485638086211200.

The previous prime is 487661578237307. The next prime is 487661578237357. The reversal of 487661578237321 is 123732875166784.

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

It can be written as a sum of positive squares in 2 ways, for example, as 150449359008400 + 337212219228921 = 12265780^2 + 18363339^2 .

It is a cyclic number.

It is not a de Polignac number, because 487661578237321 - 2²⁹ = 487661041366409 is a prime.

It is a super-2 number, since 2×487661578237321² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (487661578237621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1011746012700 + ... + 1011746013181.

It is an arithmetic number, because the mean of its divisors is an integer number (122421267565861).

Almost surely, 2^{487661578237321} is an apocalyptic number.

It is an amenable number.

487661578237321 is a deficient number, since it is larger than the sum of its proper divisors (2023492026123).

487661578237321 is a wasteful number, since it uses less digits than its factorization.

487661578237321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2023492026122.

The product of its digits is 568995840, while the sum is 70.

The spelling of 487661578237321 in words is "four hundred eighty-seven trillion, six hundred sixty-one billion, five hundred seventy-eight million, two hundred thirty-seven thousand, three hundred twenty-one".