7212540618 has 16 divisors (see below), whose sum is σ = 16027868160. Its totient is φ = 2404180188.

The previous prime is 7212540589. The next prime is 7212540653. The reversal of 7212540618 is 8160452127.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66782730 + ... + 66782837.

It is an arithmetic number, because the mean of its divisors is an integer number (1001741760).

Almost surely, 2^7212540618 is an apocalyptic number.

7212540618 is an abundant number, since it is smaller than the sum of its proper divisors (8815327542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7212540618 is a wasteful number, since it uses less digits than its factorization.

7212540618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133565578 (or 133565572 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 7212540618 is about 84926.6778933452. The cubic root of 7212540618 is about 1932.0992146495.

The spelling of 7212540618 in words is "seven billion, two hundred twelve million, five hundred forty thousand, six hundred eighteen".