7121973960 has 48 divisors (see below), whose sum is σ = 23146416540. Its totient is φ = 1899192960.

The previous prime is 7121973959. The next prime is 7121973983. The reversal of 7121973960 is 693791217.

7121973960 is a `hidden beast` number, since 71 + 2 + 197 + 396 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6114927204 + 1007046756 = 78198^2 + 31734^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9891271 + ... + 9891990.

Almost surely, 2^7121973960 is an apocalyptic number.

It is an amenable number.

7121973960 is an abundant number, since it is smaller than the sum of its proper divisors (16024442580).

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

7121973960 is a wasteful number, since it uses less digits than its factorization.

7121973960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19783278 (or 19783271 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 45.

The square root of 7121973960 is about 84391.7884630963. The cubic root of 7121973960 is about 1923.9781125992.

The spelling of 7121973960 in words is "seven billion, one hundred twenty-one million, nine hundred seventy-three thousand, nine hundred sixty".