77961614 has 4 divisors (see below), whose sum is σ = 116942424. Its totient is φ = 38980806.

The previous prime is 77961613. The next prime is 77961629. The reversal of 77961614 is 41616977.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77961613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19490402 + ... + 19490405.

It is an arithmetic number, because the mean of its divisors is an integer number (29235606).

Almost surely, 2^77961614 is an apocalyptic number.

77961614 is a deficient number, since it is larger than the sum of its proper divisors (38980810).

77961614 is a wasteful number, since it uses less digits than its factorization.

77961614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38980809.

The product of its digits is 63504, while the sum is 41.

The square root of 77961614 is about 8829.5874195797. The cubic root of 77961614 is about 427.1957668073.

The spelling of 77961614 in words is "seventy-seven million, nine hundred sixty-one thousand, six hundred fourteen".