425477793987 has 36 divisors (see below), whose sum is σ = 628494782760. Its totient is φ = 277368549312.

The previous prime is 425477793973. The next prime is 425477793989. The reversal of 425477793987 is 789397774524.

425477793987 is a `hidden beast` number, since 4 + 2 + 5 + 477 + 79 + 3 + 9 + 87 = 666.

It is not a de Polignac number, because 425477793987 - 2²⁰ = 425476745411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (425477793989) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 23709064 + ... + 23727002.

It is an arithmetic number, because the mean of its divisors is an integer number (17458188410).

Almost surely, 2^425477793987 is an apocalyptic number.

425477793987 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

425477793987 is a deficient number, since it is larger than the sum of its proper divisors (203016988773).

425477793987 is a wasteful number, since it uses less digits than its factorization.

425477793987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19232 (or 19182 counting only the distinct ones).

The product of its digits is 746807040, while the sum is 72.

The spelling of 425477793987 in words is "four hundred twenty-five billion, four hundred seventy-seven million, seven hundred ninety-three thousand, nine hundred eighty-seven".