75777161990 has 8 divisors (see below), whose sum is σ = 136398891600. Its totient is φ = 30310864792.

The previous prime is 75777161981. The next prime is 75777162007. The reversal of 75777161990 is 9916177757.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3788858090 + ... + 3788858109.

It is an arithmetic number, because the mean of its divisors is an integer number (17049861450).

Almost surely, 2^75777161990 is an apocalyptic number.

75777161990 is a deficient number, since it is larger than the sum of its proper divisors (60621729610).

75777161990 is a wasteful number, since it uses less digits than its factorization.

75777161990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7577716206.

The product of its (nonzero) digits is 5834430, while the sum is 59.

The spelling of 75777161990 in words is "seventy-five billion, seven hundred seventy-seven million, one hundred sixty-one thousand, nine hundred ninety".