1071181620487 has 4 divisors (see below), whose sum is σ = 1168561767816. Its totient is φ = 973801473160.

The previous prime is 1071181620407. The next prime is 1071181620493. The reversal of 1071181620487 is 7840261811701.

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

It is a cyclic number.

It is not a de Polignac number, because 1071181620487 - 2¹¹ = 1071181618439 is a prime.

It is a super-2 number, since 2×1071181620487² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1071181620407) 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, 48690073648 + ... + 48690073669.

It is an arithmetic number, because the mean of its divisors is an integer number (292140441954).

Almost surely, 2^{1071181620487} is an apocalyptic number.

1071181620487 is a deficient number, since it is larger than the sum of its proper divisors (97380147329).

1071181620487 is an equidigital number, since it uses as much as digits as its factorization.

1071181620487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97380147328.

The product of its (nonzero) digits is 150528, while the sum is 46.

The spelling of 1071181620487 in words is "one trillion, seventy-one billion, one hundred eighty-one million, six hundred twenty thousand, four hundred eighty-seven".