2003261278351 has 4 divisors (see below), whose sum is σ = 2037214859400. Its totient is φ = 1969307697304.

The previous prime is 2003261278349. The next prime is 2003261278409. The reversal of 2003261278351 is 1538721623002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2003261278351 - 2¹ = 2003261278349 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 (2003261288351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16976790436 + ... + 16976790553.

It is an arithmetic number, because the mean of its divisors is an integer number (509303714850).

Almost surely, 2^{2003261278351} is an apocalyptic number.

2003261278351 is a deficient number, since it is larger than the sum of its proper divisors (33953581049).

2003261278351 is an equidigital number, since it uses as much as digits as its factorization.

2003261278351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33953581048.

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 2003261278351 in words is "two trillion, three billion, two hundred sixty-one million, two hundred seventy-eight thousand, three hundred fifty-one".