4915979521 has 4 divisors (see below), whose sum is σ = 4916265732. Its totient is φ = 4915693312.

The previous prime is 4915979503. The next prime is 4915979561. The reversal of 4915979521 is 1259795194.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1029703921 + 3886275600 = 32089^2 + 62340^2 .

It is a cyclic number.

It is not a de Polignac number, because 4915979521 - 2⁵ = 4915979489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4915979561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115576 + ... + 152281.

It is an arithmetic number, because the mean of its divisors is an integer number (1229066433).

Almost surely, 2^4915979521 is an apocalyptic number.

It is an amenable number.

4915979521 is a deficient number, since it is larger than the sum of its proper divisors (286211).

4915979521 is a wasteful number, since it uses less digits than its factorization.

4915979521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286210.

The product of its digits is 1020600, while the sum is 52.

The square root of 4915979521 is about 70114.0465313478. The cubic root of 4915979521 is about 1700.3435892602.

The spelling of 4915979521 in words is "four billion, nine hundred fifteen million, nine hundred seventy-nine thousand, five hundred twenty-one".