2478505557 has 12 divisors (see below), whose sum is σ = 3632410880. Its totient is φ = 1502124360.

The previous prime is 2478505543. The next prime is 2478505573. The reversal of 2478505557 is 7555058742.

It is not a de Polignac number, because 2478505557 - 2¹⁴ = 2478489173 is a prime.

It is a super-2 number, since 2×2478505557² = 12285979592159760498, which contains 22 as substring.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2478505517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3413557 + ... + 3414282.

Almost surely, 2^2478505557 is an apocalyptic number.

It is an amenable number.

2478505557 is a deficient number, since it is larger than the sum of its proper divisors (1153905323).

2478505557 is a wasteful number, since it uses less digits than its factorization.

2478505557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6827864 (or 6827853 counting only the distinct ones).

The product of its (nonzero) digits is 1960000, while the sum is 48.

The square root of 2478505557 is about 49784.5915620486. The cubic root of 2478505557 is about 1353.3079476190.

The spelling of 2478505557 in words is "two billion, four hundred seventy-eight million, five hundred five thousand, five hundred fifty-seven".