78158885432 has 32 divisors (see below), whose sum is σ = 155288916720. Its totient is φ = 36752079360.

The previous prime is 78158885429. The next prime is 78158885437. The reversal of 78158885432 is 23458885187.

It is a super-2 number, since 2×78158885432² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78158885437) 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, 47003 + ... + 398154.

Almost surely, 2^78158885432 is an apocalyptic number.

It is an amenable number.

78158885432 is a deficient number, since it is larger than the sum of its proper divisors (77130031288).

78158885432 is a wasteful number, since it uses less digits than its factorization.

78158885432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446471 (or 446467 counting only the distinct ones).

The product of its digits is 17203200, while the sum is 59.

The spelling of 78158885432 in words is "seventy-eight billion, one hundred fifty-eight million, eight hundred eighty-five thousand, four hundred thirty-two".