1187858630661 has 8 divisors (see below), whose sum is σ = 1602893574240. Its totient is φ = 782364720432.

The previous prime is 1187858630653. The next prime is 1187858630669. The reversal of 1187858630661 is 1660368587811.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1187858630653) and next prime (1187858630669).

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

It is not a de Polignac number, because 1187858630661 - 2³ = 1187858630653 is a prime.

It is a super-2 number, since 2×1187858630661² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1187858630595 and 1187858630604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1187858630669) 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, 2385258046 + ... + 2385258543.

It is an arithmetic number, because the mean of its divisors is an integer number (200361696780).

Almost surely, 2^{1187858630661} is an apocalyptic number.

It is an amenable number.

1187858630661 is a deficient number, since it is larger than the sum of its proper divisors (415034943579).

1187858630661 is an equidigital number, since it uses as much as digits as its factorization.

1187858630661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4770516675.

The product of its (nonzero) digits is 11612160, while the sum is 60.

The spelling of 1187858630661 in words is "one trillion, one hundred eighty-seven billion, eight hundred fifty-eight million, six hundred thirty thousand, six hundred sixty-one".