163674457490 has 32 divisors (see below), whose sum is σ = 306534916080. Its totient is φ = 62846796544.

The previous prime is 163674457487. The next prime is 163674457501. The reversal of 163674457490 is 94754476361.

It is a Cunningham number, because it is equal to 404567²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 136117461481 + 27556996009 = 368941^2 + 166003^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1581029 + ... + 1681368.

Almost surely, 2^163674457490 is an apocalyptic number.

163674457490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

163674457490 is a deficient number, since it is larger than the sum of its proper divisors (142860458590).

163674457490 is a wasteful number, since it uses less digits than its factorization.

163674457490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3262606.

The product of its (nonzero) digits is 15240960, while the sum is 56.

The spelling of 163674457490 in words is "one hundred sixty-three billion, six hundred seventy-four million, four hundred fifty-seven thousand, four hundred ninety".