249490831860 has 96 divisors (see below), whose sum is σ = 776382122880. Its totient is φ = 66514738176.

The previous prime is 249490831841. The next prime is 249490831897. The reversal of 249490831860 is 68138094942.

249490831860 is a `hidden beast` number, since 2 + 4 + 9 + 490 + 83 + 18 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 249490831797 and 249490831806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2258884 + ... + 2366756.

It is an arithmetic number, because the mean of its divisors is an integer number (8087313780).

Almost surely, 2^249490831860 is an apocalyptic number.

249490831860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

249490831860 is an abundant number, since it is smaller than the sum of its proper divisors (526891291020).

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

249490831860 is a wasteful number, since it uses less digits than its factorization.

249490831860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112174 (or 112166 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The spelling of 249490831860 in words is "two hundred forty-nine billion, four hundred ninety million, eight hundred thirty-one thousand, eight hundred sixty".