7821948501 has 12 divisors (see below), whose sum is σ = 11300122080. Its totient is φ = 5213823720.

The previous prime is 7821948499. The next prime is 7821948503. The reversal of 7821948501 is 1058491287.

It is an interprime number because it is at equal distance from previous prime (7821948499) and next prime (7821948503).

It is not a de Polignac number, because 7821948501 - 2¹ = 7821948499 is a prime.

It is a super-2 number, since 2×7821948501² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7821948503) 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, 2871 + ... + 125108.

It is an arithmetic number, because the mean of its divisors is an integer number (941676840).

Almost surely, 2^7821948501 is an apocalyptic number.

It is an amenable number.

7821948501 is a deficient number, since it is larger than the sum of its proper divisors (3478173579).

7821948501 is a wasteful number, since it uses less digits than its factorization.

7821948501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134776 (or 134773 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The square root of 7821948501 is about 88441.7802907653. The cubic root of 7821948501 is about 1985.0509159216.

The spelling of 7821948501 in words is "seven billion, eight hundred twenty-one million, nine hundred forty-eight thousand, five hundred one".