645421162130 has 32 divisors (see below), whose sum is σ = 1175029027200. Its totient is φ = 255220442752.

The previous prime is 645421162117. The next prime is 645421162151. The reversal of 645421162130 is 31261124546.

It is a super-2 number, since 2×645421162130² (a number of 24 digits) contains 22 as substring.

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, 4954409 + ... + 5083011.

It is an arithmetic number, because the mean of its divisors is an integer number (36719657100).

Almost surely, 2^645421162130 is an apocalyptic number.

645421162130 is a deficient number, since it is larger than the sum of its proper divisors (529607865070).

645421162130 is a wasteful number, since it uses less digits than its factorization.

645421162130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134338.

The product of its (nonzero) digits is 34560, while the sum is 35.

Adding to 645421162130 its reverse (31261124546), we get a palindrome (676682286676).

The spelling of 645421162130 in words is "six hundred forty-five billion, four hundred twenty-one million, one hundred sixty-two thousand, one hundred thirty".