78153668 has 24 divisors (see below), whose sum is σ = 140448000. Its totient is φ = 38035008.

The previous prime is 78153653. The next prime is 78153671. The reversal of 78153668 is 86635187.

It is a super-2 number, since 2×78153668² = 12215991643708448, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 36368 + ... + 38456.

It is an arithmetic number, because the mean of its divisors is an integer number (5852000).

Almost surely, 2^78153668 is an apocalyptic number.

It is an amenable number.

78153668 is a deficient number, since it is larger than the sum of its proper divisors (62294332).

78153668 is a wasteful number, since it uses less digits than its factorization.

78153668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2339 (or 2337 counting only the distinct ones).

The product of its digits is 241920, while the sum is 44.

The square root of 78153668 is about 8840.4563230639. The cubic root of 78153668 is about 427.5462699710.

The spelling of 78153668 in words is "seventy-eight million, one hundred fifty-three thousand, six hundred sixty-eight".