2492721323478 has 48 divisors (see below), whose sum is σ = 5462945888400. Its totient is φ = 821381004288.

The previous prime is 2492721323473. The next prime is 2492721323569. The reversal of 2492721323478 is 8743231272942.

It is a happy number.

2492721323478 is a `hidden beast` number, since 2 + 4 + 9 + 272 + 1 + 323 + 47 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2492721323473) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 663373 + ... + 2329271.

It is an arithmetic number, because the mean of its divisors is an integer number (113811372675).

Almost surely, 2^{2492721323478} is an apocalyptic number.

2492721323478 is an abundant number, since it is smaller than the sum of its proper divisors (2970224564922).

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

2492721323478 is a wasteful number, since it uses less digits than its factorization.

2492721323478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666861 (or 1666858 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 54.

The spelling of 2492721323478 in words is "two trillion, four hundred ninety-two billion, seven hundred twenty-one million, three hundred twenty-three thousand, four hundred seventy-eight".