78554611 has 2 divisors, whose sum is σ = 78554612. Its totient is φ = 78554610.

The previous prime is 78554587. The next prime is 78554633. The reversal of 78554611 is 11645587.

It is a strong prime.

It is an emirp because it is prime and its reverse (11645587) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78554611 is a prime.

It is a super-2 number, since 2×78554611² = 12341653818722642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78555611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39277305 + 39277306.

It is an arithmetic number, because the mean of its divisors is an integer number (39277306).

Almost surely, 2^78554611 is an apocalyptic number.

78554611 is a deficient number, since it is larger than the sum of its proper divisors (1).

78554611 is an equidigital number, since it uses as much as digits as its factorization.

78554611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33600, while the sum is 37.

The square root of 78554611 is about 8863.1039145437. The cubic root of 78554611 is about 428.2761541395.

The spelling of 78554611 in words is "seventy-eight million, five hundred fifty-four thousand, six hundred eleven".