2402689103721 has 45 divisors (see below), whose sum is σ = 3615504823029. Its totient is φ = 1590139377216.

The previous prime is 2402689103713. The next prime is 2402689103741. The reversal of 2402689103721 is 1273019862042.

The square root of 2402689103721 is 1550061.

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

2402689103721 is a `hidden beast` number, since 2 + 4 + 0 + 268 + 9 + 10 + 372 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 428945093721 + 1973744010000 = 654939^2 + 1404900^2 .

It is not a de Polignac number, because 2402689103721 - 2³ = 2402689103713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2402689103741) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 2190235645 + ... + 2190236741.

Almost surely, 2^{2402689103721} is an apocalyptic number.

2402689103721 is the 1550061-st square number.

2402689103721 is the 775031-st centered octagonal number.

It is an amenable number.

2402689103721 is a deficient number, since it is larger than the sum of its proper divisors (1212815719308).

2402689103721 is an frugal number, since it uses more digits than its factorization.

2402689103721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2520 (or 1257 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 2402689103721 in words is "two trillion, four hundred two billion, six hundred eighty-nine million, one hundred three thousand, seven hundred twenty-one".