1954131660 has 72 divisors (see below), whose sum is σ = 6383504400. Its totient is φ = 481016448.

The previous prime is 1954131649. The next prime is 1954131731. The reversal of 1954131660 is 661314591.

It is a super-2 number, since 2×1954131660² = 7637261089228711200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 415210 + ... + 419889.

Almost surely, 2^1954131660 is an apocalyptic number.

1954131660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1954131660 is an abundant number, since it is smaller than the sum of its proper divisors (4429372740).

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

1954131660 is a wasteful number, since it uses less digits than its factorization.

1954131660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835127 (or 835122 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 1954131660 is about 44205.5614148265. The cubic root of 1954131660 is about 1250.2147172484.

The spelling of 1954131660 in words is "one billion, nine hundred fifty-four million, one hundred thirty-one thousand, six hundred sixty".