1955680538 has 16 divisors (see below), whose sum is σ = 3353967744. Its totient is φ = 837805680.

The previous prime is 1955680523. The next prime is 1955680603. The reversal of 1955680538 is 8350865591.

It is an unprimeable number.

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, 8483 + ... + 63113.

It is an arithmetic number, because the mean of its divisors is an integer number (209622984).

Almost surely, 2^1955680538 is an apocalyptic number.

1955680538 is a deficient number, since it is larger than the sum of its proper divisors (1398287206).

1955680538 is a wasteful number, since it uses less digits than its factorization.

1955680538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57197.

The product of its (nonzero) digits is 1296000, while the sum is 50.

The square root of 1955680538 is about 44223.0769847599. The cubic root of 1955680538 is about 1250.5449438345.

The spelling of 1955680538 in words is "one billion, nine hundred fifty-five million, six hundred eighty thousand, five hundred thirty-eight".