77925556 has 12 divisors (see below), whose sum is σ = 138405568. Its totient is φ = 38381112.

The previous prime is 77925539. The next prime is 77925557. The reversal of 77925556 is 65552977.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77925557) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 145116 + ... + 145651.

Almost surely, 2^77925556 is an apocalyptic number.

It is an amenable number.

77925556 is a deficient number, since it is larger than the sum of its proper divisors (60480012).

77925556 is a wasteful number, since it uses less digits than its factorization.

77925556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290838 (or 290836 counting only the distinct ones).

The product of its digits is 661500, while the sum is 46.

The square root of 77925556 is about 8827.5452986660. The cubic root of 77925556 is about 427.1298959272.

It can be divided in two parts, 779 and 25556, that added together give a triangular number (26335 = T₂₂₉).

The spelling of 77925556 in words is "seventy-seven million, nine hundred twenty-five thousand, five hundred fifty-six".