2132154498778 has 16 divisors (see below), whose sum is σ = 3206524140360. Its totient is φ = 1063315745856.

The previous prime is 2132154498743. The next prime is 2132154498791. The reversal of 2132154498778 is 8778944512312.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1447634893329 + 684519605449 = 1203177^2 + 827357^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 970000 + ... + 2281492.

Almost surely, 2^{2132154498778} is an apocalyptic number.

2132154498778 is a deficient number, since it is larger than the sum of its proper divisors (1074369641582).

2132154498778 is a wasteful number, since it uses less digits than its factorization.

2132154498778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1313601.

The product of its digits is 27095040, while the sum is 61.

The spelling of 2132154498778 in words is "two trillion, one hundred thirty-two billion, one hundred fifty-four million, four hundred ninety-eight thousand, seven hundred seventy-eight".