47237979649 has 27 divisors (see below), whose sum is σ = 55975866921. Its totient is φ = 39747687840.

The previous prime is 47237979641. The next prime is 47237979671. The reversal of 47237979649 is 94697973274.

The square root of 47237979649 is 217343.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 3255501249 + 43982478400 = 57057^2 + 209720^2 .

It is not a de Polignac number, because 47237979649 - 2³ = 47237979641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47237979641) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 92805207 + ... + 92805715.

Almost surely, 2^47237979649 is an apocalyptic number.

47237979649 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

47237979649 is the 217343-rd square number.

47237979649 is the 108672-nd centered octagonal number.

It is an amenable number.

47237979649 is a deficient number, since it is larger than the sum of its proper divisors (8737887272).

47237979649 is an frugal number, since it uses more digits than its factorization.

47237979649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154 (or 577 counting only the distinct ones).

The product of its digits is 144027072, while the sum is 67.

The spelling of 47237979649 in words is "forty-seven billion, two hundred thirty-seven million, nine hundred seventy-nine thousand, six hundred forty-nine".