78163025 has 24 divisors (see below), whose sum is σ = 103111704. Its totient is φ = 58572800.

The previous prime is 78163003. The next prime is 78163037. The reversal of 78163025 is 52036187.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 20948929 + 57214096 = 4577^2 + 7564^2 .

It is not a de Polignac number, because 78163025 - 2¹⁰ = 78162001 is a prime.

It is a super-2 number, since 2×78163025² = 12218916954301250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78162982 and 78163000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149765 + ... + 150285.

It is an arithmetic number, because the mean of its divisors is an integer number (4296321).

Almost surely, 2^78163025 is an apocalyptic number.

It is an amenable number.

78163025 is a deficient number, since it is larger than the sum of its proper divisors (24948679).

78163025 is a wasteful number, since it uses less digits than its factorization.

78163025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901 (or 896 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 78163025 is about 8840.9855219879. The cubic root of 78163025 is about 427.5633320442.

The spelling of 78163025 in words is "seventy-eight million, one hundred sixty-three thousand, twenty-five".