1621846954 has 128 divisors (see below), whose sum is σ = 3413975040. Its totient is φ = 558959616.

The previous prime is 1621846949. The next prime is 1621846969. The reversal of 1621846954 is 4596481261.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2762649 + ... + 2763235.

It is an arithmetic number, because the mean of its divisors is an integer number (26671680).

Almost surely, 2^1621846954 is an apocalyptic number.

1621846954 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1621846954 is an abundant number, since it is smaller than the sum of its proper divisors (1792128086).

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

1621846954 is a wasteful number, since it uses less digits than its factorization.

1621846954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692.

The product of its digits is 414720, while the sum is 46.

The square root of 1621846954 is about 40272.1610296741. The cubic root of 1621846954 is about 1174.9064549642.

The spelling of 1621846954 in words is "one billion, six hundred twenty-one million, eight hundred forty-six thousand, nine hundred fifty-four".