77373072220 has 24 divisors (see below), whose sum is σ = 165147117408. Its totient is φ = 30441864000.

The previous prime is 77373072199. The next prime is 77373072241. The reversal of 77373072220 is 2227037377.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (77373072199) and next prime (77373072241).

It is a super-2 number, since 2×77373072220² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31709056 + ... + 31711495.

It is an arithmetic number, because the mean of its divisors is an integer number (6881129892).

Almost surely, 2^77373072220 is an apocalyptic number.

It is an amenable number.

77373072220 is an abundant number, since it is smaller than the sum of its proper divisors (87774045188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77373072220 is a wasteful number, since it uses less digits than its factorization.

77373072220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63420621 (or 63420619 counting only the distinct ones).

The product of its (nonzero) digits is 172872, while the sum is 40.

The spelling of 77373072220 in words is "seventy-seven billion, three hundred seventy-three million, seventy-two thousand, two hundred twenty".