1161501266478 has 32 divisors (see below), whose sum is σ = 2654906132736. Its totient is φ = 331851742848.

The previous prime is 1161501266473. The next prime is 1161501266491. The reversal of 1161501266478 is 8746621051611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161501266473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2604150 + ... + 3017382.

It is an arithmetic number, because the mean of its divisors is an integer number (82965816648).

Almost surely, 2^{1161501266478} is an apocalyptic number.

1161501266478 is an abundant number, since it is smaller than the sum of its proper divisors (1493404866258).

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

1161501266478 is a wasteful number, since it uses less digits than its factorization.

1161501266478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480168.

The product of its (nonzero) digits is 483840, while the sum is 48.

The spelling of 1161501266478 in words is "one trillion, one hundred sixty-one billion, five hundred one million, two hundred sixty-six thousand, four hundred seventy-eight".