78374583121 has 8 divisors (see below), whose sum is σ = 83350074080. Its totient is φ = 73484143488.

The previous prime is 78374583097. The next prime is 78374583137. The reversal of 78374583121 is 12138547387.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78374583121 - 2⁹ = 78374582609 is a prime.

It is a super-2 number, since 2×78374583121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78374583821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21260931 + ... + 21264616.

It is an arithmetic number, because the mean of its divisors is an integer number (10418759260).

Almost surely, 2^78374583121 is an apocalyptic number.

It is an amenable number.

78374583121 is a deficient number, since it is larger than the sum of its proper divisors (4975490959).

78374583121 is a wasteful number, since it uses less digits than its factorization.

78374583121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42525663.

The product of its digits is 1128960, while the sum is 49.

The spelling of 78374583121 in words is "seventy-eight billion, three hundred seventy-four million, five hundred eighty-three thousand, one hundred twenty-one".