78241641 has 4 divisors (see below), whose sum is σ = 104322192. Its totient is φ = 52161092.

The previous prime is 78241577. The next prime is 78241651. The reversal of 78241641 is 14614287.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78241641 - 2⁶ = 78241577 is a prime.

It is a super-2 number, since 2×78241641² = 12243508772745762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78241651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13040271 + ... + 13040276.

It is an arithmetic number, because the mean of its divisors is an integer number (26080548).

Almost surely, 2^78241641 is an apocalyptic number.

It is an amenable number.

78241641 is a deficient number, since it is larger than the sum of its proper divisors (26080551).

78241641 is a wasteful number, since it uses less digits than its factorization.

78241641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26080550.

The product of its digits is 10752, while the sum is 33.

The square root of 78241641 is about 8845.4305152434. The cubic root of 78241641 is about 427.7066310692.

The spelling of 78241641 in words is "seventy-eight million, two hundred forty-one thousand, six hundred forty-one".