78156045 has 48 divisors (see below), whose sum is σ = 151429824. Its totient is φ = 36960000.

The previous prime is 78156031. The next prime is 78156077. The reversal of 78156045 is 54065187.

It is not a de Polignac number, because 78156045 - 2⁹ = 78155533 is a prime.

It is a super-2 number, since 2×78156045² = 12216734740084050, which 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 47 ways as a sum of consecutive naturals, for example, 18370 + ... + 22220.

It is an arithmetic number, because the mean of its divisors is an integer number (3154788).

Almost surely, 2^78156045 is an apocalyptic number.

It is an amenable number.

78156045 is a deficient number, since it is larger than the sum of its proper divisors (73273779).

78156045 is a wasteful number, since it uses less digits than its factorization.

78156045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3914 (or 3911 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 78156045 is about 8840.5907608033. The cubic root of 78156045 is about 427.5506044538.

The spelling of 78156045 in words is "seventy-eight million, one hundred fifty-six thousand, forty-five".