1187246877551 has 4 divisors (see below), whose sum is σ = 1356853574352. Its totient is φ = 1017640180752.

The previous prime is 1187246877469. The next prime is 1187246877559. The reversal of 1187246877551 is 1557786427811.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1187246877551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1187246877559) 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, 84803348390 + ... + 84803348403.

It is an arithmetic number, because the mean of its divisors is an integer number (339213393588).

Almost surely, 2^{1187246877551} is an apocalyptic number.

1187246877551 is a deficient number, since it is larger than the sum of its proper divisors (169606696801).

1187246877551 is an equidigital number, since it uses as much as digits as its factorization.

1187246877551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169606696800.

The product of its digits is 26342400, while the sum is 62.

The spelling of 1187246877551 in words is "one trillion, one hundred eighty-seven billion, two hundred forty-six million, eight hundred seventy-seven thousand, five hundred fifty-one".