78373131450 has 24 divisors (see below), whose sum is σ = 194365366368. Its totient is φ = 20899501680.

The previous prime is 78373131427. The next prime is 78373131457. The reversal of 78373131450 is 5413137387.

It is a super-2 number, since 2×78373131450² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78373131457) 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, 261243622 + ... + 261243921.

It is an arithmetic number, because the mean of its divisors is an integer number (8098556932).

Almost surely, 2^78373131450 is an apocalyptic number.

78373131450 is an abundant number, since it is smaller than the sum of its proper divisors (115992234918).

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

78373131450 is a wasteful number, since it uses less digits than its factorization.

78373131450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522487558 (or 522487553 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 42.

The spelling of 78373131450 in words is "seventy-eight billion, three hundred seventy-three million, one hundred thirty-one thousand, four hundred fifty".