1177145646 has 64 divisors (see below), whose sum is σ = 2529926400. Its totient is φ = 364041216.

The previous prime is 1177145623. The next prime is 1177145647. The reversal of 1177145646 is 6465417711.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1177145598 and 1177145607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1177145647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1748766 + ... + 1749438.

It is an arithmetic number, because the mean of its divisors is an integer number (39530100).

Almost surely, 2^1177145646 is an apocalyptic number.

1177145646 is an abundant number, since it is smaller than the sum of its proper divisors (1352780754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1177145646 is a wasteful number, since it uses less digits than its factorization.

1177145646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993.

The product of its digits is 141120, while the sum is 42.

The square root of 1177145646 is about 34309.5561906592. The cubic root of 1177145646 is about 1055.8690669992.

The spelling of 1177145646 in words is "one billion, one hundred seventy-seven million, one hundred forty-five thousand, six hundred forty-six".