1621674351490 has 16 divisors (see below), whose sum is σ = 2930643374400. Its totient is φ = 646085398000.

The previous prime is 1621674351461. The next prime is 1621674351497. The reversal of 1621674351490 is 941534761261.

It is not an unprimeable number, because it can be changed into a prime (1621674351497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323040190 + ... + 323045209.

It is an arithmetic number, because the mean of its divisors is an integer number (183165210900).

Almost surely, 2^{1621674351490} is an apocalyptic number.

1621674351490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1621674351490 is a deficient number, since it is larger than the sum of its proper divisors (1308969022910).

1621674351490 is a wasteful number, since it uses less digits than its factorization.

1621674351490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646085657.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 1621674351490 in words is "one trillion, six hundred twenty-one billion, six hundred seventy-four million, three hundred fifty-one thousand, four hundred ninety".