321664125145522 has 16 divisors (see below), whose sum is σ = 483132331193400. Its totient is φ = 160620016599040.

The previous prime is 321664125145507. The next prime is 321664125145529. The reversal of 321664125145522 is 225541521466123.

It can be written as a sum of positive squares in 4 ways, for example, as 253050751489761 + 68613373655761 = 15907569^2 + 8283319^2 .

It is not an unprimeable number, because it can be changed into a prime (321664125145529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 627247554 + ... + 627760162.

Almost surely, 2^{321664125145522} is an apocalyptic number.

321664125145522 is a deficient number, since it is larger than the sum of its proper divisors (161468206047878).

321664125145522 is a wasteful number, since it uses less digits than its factorization.

321664125145522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925661.

The product of its digits is 3456000, while the sum is 49.

The spelling of 321664125145522 in words is "three hundred twenty-one trillion, six hundred sixty-four billion, one hundred twenty-five million, one hundred forty-five thousand, five hundred twenty-two".