2640137554 has 16 divisors (see below), whose sum is σ = 4107331800. Its totient is φ = 1271261824.

The previous prime is 2640137527. The next prime is 2640137557. The reversal of 2640137554 is 4557310462.

It can be written as a sum of positive squares in 4 ways, for example, as 1988714025 + 651423529 = 44595^2 + 25523^2 .

It is a super-2 number, since 2×2640137554² = 13940652608082205832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2640137557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35947 + ... + 81070.

Almost surely, 2^2640137554 is an apocalyptic number.

2640137554 is a deficient number, since it is larger than the sum of its proper divisors (1467194246).

2640137554 is a wasteful number, since it uses less digits than its factorization.

2640137554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117437.

The product of its (nonzero) digits is 100800, while the sum is 37.

The square root of 2640137554 is about 51382.2688677719. The cubic root of 2640137554 is about 1382.1086495338.

The spelling of 2640137554 in words is "two billion, six hundred forty million, one hundred thirty-seven thousand, five hundred fifty-four".