67780623949 has 4 divisors (see below), whose sum is σ = 67814064864. Its totient is φ = 67747183036.

The previous prime is 67780623919. The next prime is 67780624063. The reversal of 67780623949 is 94932608776.

67780623949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 67780623949 - 2⁵ = 67780623917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67780623919) 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, 16717417 + ... + 16721470.

It is an arithmetic number, because the mean of its divisors is an integer number (16953516216).

Almost surely, 2^67780623949 is an apocalyptic number.

It is an amenable number.

67780623949 is a deficient number, since it is larger than the sum of its proper divisors (33440915).

67780623949 is a wasteful number, since it uses less digits than its factorization.

67780623949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33440914.

The product of its (nonzero) digits is 27433728, while the sum is 61.

The spelling of 67780623949 in words is "sixty-seven billion, seven hundred eighty million, six hundred twenty-three thousand, nine hundred forty-nine".