1955640001 has 8 divisors (see below), whose sum is σ = 2238564224. Its totient is φ = 1673602560.

The previous prime is 1955639993. The next prime is 1955640007. The reversal of 1955640001 is 1000465591.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1955640001 - 2³ = 1955639993 is a prime.

It is a super-2 number, since 2×1955640001² = 7649055627022560002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1955640007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216960 + ... + 225793.

It is an arithmetic number, because the mean of its divisors is an integer number (279820528).

Almost surely, 2^1955640001 is an apocalyptic number.

It is an amenable number.

1955640001 is a deficient number, since it is larger than the sum of its proper divisors (282924223).

1955640001 is an equidigital number, since it uses as much as digits as its factorization.

1955640001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443391.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1955640001 is about 44222.6186583291. The cubic root of 1955640001 is about 1250.5363034167.

The spelling of 1955640001 in words is "one billion, nine hundred fifty-five million, six hundred forty thousand, one".