1634664426660 has 72 divisors (see below), whose sum is σ = 5250157521336. Its totient is φ = 410268718080.

The previous prime is 1634664426641. The next prime is 1634664426701. The reversal of 1634664426660 is 666244664361.

It can be written as a sum of positive squares in 4 ways, for example, as 178360939584 + 1456303487076 = 422328^2 + 1206774^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1634664426597 and 1634664426606.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 267098971 + ... + 267105090.

It is an arithmetic number, because the mean of its divisors is an integer number (72918854463).

Almost surely, 2^{1634664426660} is an apocalyptic number.

1634664426660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1634664426660 is an abundant number, since it is smaller than the sum of its proper divisors (3615493094676).

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

1634664426660 is a wasteful number, since it uses less digits than its factorization.

1634664426660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534204093 (or 534204088 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 54.

The spelling of 1634664426660 in words is "one trillion, six hundred thirty-four billion, six hundred sixty-four million, four hundred twenty-six thousand, six hundred sixty".