1621013746 has 32 divisors (see below), whose sum is σ = 2742312960. Its totient is φ = 711968400.

The previous prime is 1621013717. The next prime is 1621013773. The reversal of 1621013746 is 6473101261.

It is a Harshad number since it is a multiple of its sum of digits (31).

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, 584455 + ... + 587221.

It is an arithmetic number, because the mean of its divisors is an integer number (85697280).

Almost surely, 2^1621013746 is an apocalyptic number.

1621013746 is a deficient number, since it is larger than the sum of its proper divisors (1121299214).

1621013746 is a wasteful number, since it uses less digits than its factorization.

1621013746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3670.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 1621013746 is about 40261.8149864111. The cubic root of 1621013746 is about 1174.7052216021.

The spelling of 1621013746 in words is "one billion, six hundred twenty-one million, thirteen thousand, seven hundred forty-six".