3980545557121 has 16 divisors (see below), whose sum is σ = 4706129691648. Its totient is φ = 3294672609600.

The previous prime is 3980545557113. The next prime is 3980545557127. The reversal of 3980545557121 is 1217555450893.

It is not a de Polignac number, because 3980545557121 - 2³ = 3980545557113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3980545557127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19795330 + ... + 19995403.

It is an arithmetic number, because the mean of its divisors is an integer number (294133105728).

Almost surely, 2^{3980545557121} is an apocalyptic number.

3980545557121 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3980545557121 is a deficient number, since it is larger than the sum of its proper divisors (725584134527).

3980545557121 is a wasteful number, since it uses less digits than its factorization.

3980545557121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39791232.

The product of its (nonzero) digits is 7560000, while the sum is 55.

The spelling of 3980545557121 in words is "three trillion, nine hundred eighty billion, five hundred forty-five million, five hundred fifty-seven thousand, one hundred twenty-one".