2478778737 has 8 divisors (see below), whose sum is σ = 3359219520. Its totient is φ = 1625428560.

The previous prime is 2478778733. The next prime is 2478778763. The reversal of 2478778737 is 7378778742.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2478778737 - 2² = 2478778733 is a prime.

It is a super-2 number, since 2×2478778737² = 12288688054006630338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2478778733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6772437 + ... + 6772802.

It is an arithmetic number, because the mean of its divisors is an integer number (419902440).

Almost surely, 2^2478778737 is an apocalyptic number.

It is an amenable number.

2478778737 is a deficient number, since it is larger than the sum of its proper divisors (880440783).

2478778737 is a wasteful number, since it uses less digits than its factorization.

2478778737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13545303.

The product of its digits is 25815552, while the sum is 60.

The square root of 2478778737 is about 49787.3351064304. The cubic root of 2478778737 is about 1353.3576661658.

The spelling of 2478778737 in words is "two billion, four hundred seventy-eight million, seven hundred seventy-eight thousand, seven hundred thirty-seven".