2545401761 has 4 divisors (see below), whose sum is σ = 2909030592. Its totient is φ = 2181772932.

The previous prime is 2545401673. The next prime is 2545401763. The reversal of 2545401761 is 1671045452.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2545401761 - 2¹⁴ = 2545385377 is a prime.

It is a super-2 number, since 2×2545401761² = 12958140249803802242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2545401763) 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, 181814405 + ... + 181814418.

It is an arithmetic number, because the mean of its divisors is an integer number (727257648).

Almost surely, 2^2545401761 is an apocalyptic number.

It is an amenable number.

2545401761 is a deficient number, since it is larger than the sum of its proper divisors (363628831).

2545401761 is an equidigital number, since it uses as much as digits as its factorization.

2545401761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363628830.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 2545401761 is about 50451.9747978213. The cubic root of 2545401761 is about 1365.3755242436.

The spelling of 2545401761 in words is "two billion, five hundred forty-five million, four hundred one thousand, seven hundred sixty-one".