276401645 has 32 divisors (see below), whose sum is σ = 380889600. Its totient is φ = 190854144.

The previous prime is 276401641. The next prime is 276401659. The reversal of 276401645 is 546104672.

It is not a de Polignac number, because 276401645 - 2² = 276401641 is a prime.

It is a super-3 number, since 3×276401645³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (276401641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96149 + ... + 98981.

It is an arithmetic number, because the mean of its divisors is an integer number (11902800).

Almost surely, 2^276401645 is an apocalyptic number.

It is an amenable number.

276401645 is a deficient number, since it is larger than the sum of its proper divisors (104487955).

276401645 is a wasteful number, since it uses less digits than its factorization.

276401645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2949.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 276401645 is about 16625.3314252679. The cubic root of 276401645 is about 651.3986804459.

The spelling of 276401645 in words is "two hundred seventy-six million, four hundred one thousand, six hundred forty-five".