78150765 has 64 divisors (see below), whose sum is σ = 158257152. Its totient is φ = 31987200.

The previous prime is 78150731. The next prime is 78150769. The reversal of 78150765 is 56705187.

It is not a de Polignac number, because 78150765 - 2¹⁰ = 78149741 is a prime.

It is a super-2 number, since 2×78150765² = 12215084140170450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78150769) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 81529 + ... + 82481.

It is an arithmetic number, because the mean of its divisors is an integer number (2472768).

Almost surely, 2^78150765 is an apocalyptic number.

It is an amenable number.

78150765 is an abundant number, since it is smaller than the sum of its proper divisors (80106387).

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

78150765 is a wasteful number, since it uses less digits than its factorization.

78150765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050.

The product of its (nonzero) digits is 58800, while the sum is 39.

The square root of 78150765 is about 8840.2921331820. The cubic root of 78150765 is about 427.5409762029.

It can be divided in two parts, 7815076 and 5, that added together give a triangular number (7815081 = T₃₉₅₃).

The spelling of 78150765 in words is "seventy-eight million, one hundred fifty thousand, seven hundred sixty-five".