2131510677578 has 32 divisors (see below), whose sum is σ = 3533529723264. Its totient is φ = 959180631552.

The previous prime is 2131510677577. The next prime is 2131510677599. The reversal of 2131510677578 is 8757760151312.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2131510677577) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2389526 + ... + 3157982.

It is an arithmetic number, because the mean of its divisors is an integer number (110422803852).

Almost surely, 2^{2131510677578} is an apocalyptic number.

2131510677578 is a deficient number, since it is larger than the sum of its proper divisors (1402019045686).

2131510677578 is a wasteful number, since it uses less digits than its factorization.

2131510677578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772046.

The product of its (nonzero) digits is 2469600, while the sum is 53.

The spelling of 2131510677578 in words is "two trillion, one hundred thirty-one billion, five hundred ten million, six hundred seventy-seven thousand, five hundred seventy-eight".