87051490911001 has 4 divisors (see below), whose sum is σ = 87051536743972. Its totient is φ = 87051445078032.

The previous prime is 87051490910933. The next prime is 87051490911017. The reversal of 87051490911001 is 10011909415078.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 86926235083776 + 125255827225 = 9323424^2 + 353915^2 .

It is a cyclic number.

It is not a de Polignac number, because 87051490911001 - 2⁷ = 87051490910873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87051490911041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19938510 + ... + 23909143.

It is an arithmetic number, because the mean of its divisors is an integer number (21762884185993).

Almost surely, 2^{87051490911001} is an apocalyptic number.

It is an amenable number.

87051490911001 is a deficient number, since it is larger than the sum of its proper divisors (45832971).

87051490911001 is a wasteful number, since it uses less digits than its factorization.

87051490911001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45832970.

The product of its (nonzero) digits is 90720, while the sum is 46.

The spelling of 87051490911001 in words is "eighty-seven trillion, fifty-one billion, four hundred ninety million, nine hundred eleven thousand, one".