77990111001001 has 8 divisors (see below), whose sum is σ = 78551806205600. Its totient is φ = 77428424586240.

The previous prime is 77990111000999. The next prime is 77990111001007. The reversal of 77990111001001 is 10010011109977.

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

It is a cyclic number.

It is not a de Polignac number, because 77990111001001 - 2¹ = 77990111000999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77990111001007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16162345 + ... + 20425513.

It is an arithmetic number, because the mean of its divisors is an integer number (9818975775700).

Almost surely, 2^{77990111001001} is an apocalyptic number.

It is an amenable number.

77990111001001 is a deficient number, since it is larger than the sum of its proper divisors (561695204599).

77990111001001 is a wasteful number, since it uses less digits than its factorization.

77990111001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4394919.

The product of its (nonzero) digits is 3969, while the sum is 37.

The spelling of 77990111001001 in words is "seventy-seven trillion, nine hundred ninety billion, one hundred eleven million, one thousand, one".