1955440856 has 8 divisors (see below), whose sum is σ = 3666451620. Its totient is φ = 977720424.

The previous prime is 1955440849. The next prime is 1955440859. The reversal of 1955440856 is 6580445591.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1955440856.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1955440859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122215046 + ... + 122215061.

Almost surely, 2^1955440856 is an apocalyptic number.

It is an amenable number.

1955440856 is a deficient number, since it is larger than the sum of its proper divisors (1711010764).

1955440856 is a wasteful number, since it uses less digits than its factorization.

1955440856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244430113 (or 244430109 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 47.

The square root of 1955440856 is about 44220.3669817427. The cubic root of 1955440856 is about 1250.4938541408.

The spelling of 1955440856 in words is "one billion, nine hundred fifty-five million, four hundred forty thousand, eight hundred fifty-six".