78140156252 has 24 divisors (see below), whose sum is σ = 142021797120. Its totient is φ = 37590679280.

The previous prime is 78140156249. The next prime is 78140156287. The reversal of 78140156252 is 25265104187.

It is a super-2 number, since 2×78140156252² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 3511274 + ... + 3533457.

It is an arithmetic number, because the mean of its divisors is an integer number (5917574880).

Almost surely, 2^78140156252 is an apocalyptic number.

It is an amenable number.

78140156252 is a deficient number, since it is larger than the sum of its proper divisors (63881640868).

78140156252 is a wasteful number, since it uses less digits than its factorization.

78140156252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7044841 (or 7044839 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 41.

The spelling of 78140156252 in words is "seventy-eight billion, one hundred forty million, one hundred fifty-six thousand, two hundred fifty-two".