1635666480 has 160 divisors (see below), whose sum is σ = 6438873600. Its totient is φ = 373863168.

The previous prime is 1635666467. The next prime is 1635666493. The reversal of 1635666480 is 846665361.

It is an interprime number because it is at equal distance from previous prime (1635666467) and next prime (1635666493).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38970 + ... + 69209.

It is an arithmetic number, because the mean of its divisors is an integer number (40242960).

Almost surely, 2^1635666480 is an apocalyptic number.

1635666480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1635666480 is an abundant number, since it is smaller than the sum of its proper divisors (4803207120).

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

1635666480 is a wasteful number, since it uses less digits than its factorization.

1635666480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108208 (or 108196 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 1635666480 is about 40443.3737465113. The cubic root of 1635666480 is about 1178.2340913177.

The spelling of 1635666480 in words is "one billion, six hundred thirty-five million, six hundred sixty-six thousand, four hundred eighty".