1902879543601 has 3 divisors (see below), whose sum is σ = 1902880923051. Its totient is φ = 1902878164152.

The previous prime is 1902879543589. The next prime is 1902879543661. The reversal of 1902879543601 is 1063459782091.

It is a happy number.

The square root of 1902879543601 is 1379449.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 634012470001 + 1268867073600 = 796249^2 + 1126440^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1902879543601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1902879543661) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 689725 + ... + 2069173.

It is an arithmetic number, because the mean of its divisors is an integer number (634293641017).

It is a 1-persistent number, because it is pandigital, but 2⋅1902879543601 = 3805759087202 is not.

Almost surely, 2^{1902879543601} is an apocalyptic number.

1902879543601 is the 1379449-th square number.

1902879543601 is the 689725-th centered octagonal number.

It is an amenable number.

1902879543601 is a deficient number, since it is larger than the sum of its proper divisors (1379450).

1902879543601 is an frugal number, since it uses more digits than its factorization.

1902879543601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2758898 (or 1379449 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 1902879543601 in words is "one trillion, nine hundred two billion, eight hundred seventy-nine million, five hundred forty-three thousand, six hundred one".