1955530961999 has 8 divisors (see below), whose sum is σ = 1982467925760. Its totient is φ = 1928648583576.

The previous prime is 1955530961953. The next prime is 1955530962023. The reversal of 1955530961999 is 9991690355591.

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

It is a cyclic number.

It is not a de Polignac number, because 1955530961999 - 2¹² = 1955530957903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1955530961299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13574189 + ... + 13717494.

It is an arithmetic number, because the mean of its divisors is an integer number (247808490720).

Almost surely, 2^{1955530961999} is an apocalyptic number.

1955530961999 is a deficient number, since it is larger than the sum of its proper divisors (26936963761).

1955530961999 is an equidigital number, since it uses as much as digits as its factorization.

1955530961999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27292669.

The product of its (nonzero) digits is 132860250, while the sum is 71.

The spelling of 1955530961999 in words is "one trillion, nine hundred fifty-five billion, five hundred thirty million, nine hundred sixty-one thousand, nine hundred ninety-nine".