1988959555479 has 8 divisors (see below), whose sum is σ = 2855941925872. Its totient is φ = 1223975111040.

The previous prime is 1988959555477. The next prime is 1988959555481. The reversal of 1988959555479 is 9745559598891.

It is an interprime number because it is at equal distance from previous prime (1988959555477) and next prime (1988959555481).

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

It is not a de Polignac number, because 1988959555479 - 2¹ = 1988959555477 is a prime.

It is a super-2 number, since 2×1988959555479² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1988959555477) 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, 25499481442 + ... + 25499481519.

It is an arithmetic number, because the mean of its divisors is an integer number (356992740734).

Almost surely, 2^{1988959555479} is an apocalyptic number.

1988959555479 is a deficient number, since it is larger than the sum of its proper divisors (866982370393).

1988959555479 is a wasteful number, since it uses less digits than its factorization.

1988959555479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50998962977.

The product of its digits is 7348320000, while the sum is 84.

The spelling of 1988959555479 in words is "one trillion, nine hundred eighty-eight billion, nine hundred fifty-nine million, five hundred fifty-five thousand, four hundred seventy-nine".