2555661554 has 4 divisors (see below), whose sum is σ = 3833492334. Its totient is φ = 1277830776.

The previous prime is 2555661553. The next prime is 2555661617. The reversal of 2555661554 is 4551665552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2507705929 + 47955625 = 50077^2 + 6925^2 .

It is not an unprimeable number, because it can be changed into a prime (2555661553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638915387 + ... + 638915390.

Almost surely, 2^2555661554 is an apocalyptic number.

2555661554 is a deficient number, since it is larger than the sum of its proper divisors (1277830780).

2555661554 is a wasteful number, since it uses less digits than its factorization.

2555661554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277830779.

The product of its digits is 900000, while the sum is 44.

The square root of 2555661554 is about 50553.5513490398. The cubic root of 2555661554 is about 1367.2075455644.

The spelling of 2555661554 in words is "two billion, five hundred fifty-five million, six hundred sixty-one thousand, five hundred fifty-four".