78146421373240 has 128 divisors (see below), whose sum is σ = 207366426086400. Its totient is φ = 26193653614080.

The previous prime is 78146421373213. The next prime is 78146421373249. The reversal of 78146421373240 is 4237312464187.

It is a super-2 number, since 2×78146421373240² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78146421373249) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126010384 + ... + 126629023.

It is an arithmetic number, because the mean of its divisors is an integer number (1620050203800).

Almost surely, 2^{78146421373240} is an apocalyptic number.

It is an amenable number.

78146421373240 is an abundant number, since it is smaller than the sum of its proper divisors (129220004713160).

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

78146421373240 is a wasteful number, since it uses less digits than its factorization.

78146421373240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252639485 (or 252639481 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 52.

The spelling of 78146421373240 in words is "seventy-eight trillion, one hundred forty-six billion, four hundred twenty-one million, three hundred seventy-three thousand, two hundred forty".