7621021642 has 32 divisors (see below), whose sum is σ = 12469484160. Its totient is φ = 3472372800.

The previous prime is 7621021637. The next prime is 7621021649. The reversal of 7621021642 is 2461201267.

It is not an unprimeable number, because it can be changed into a prime (7621021649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 633984 + ... + 645892.

It is an arithmetic number, because the mean of its divisors is an integer number (389671380).

Almost surely, 2^7621021642 is an apocalyptic number.

7621021642 is a deficient number, since it is larger than the sum of its proper divisors (4848462518).

7621021642 is a wasteful number, since it uses less digits than its factorization.

7621021642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12238.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 7621021642 is about 87298.4629990700. The cubic root of 7621021642 is about 1967.9062195394.

The spelling of 7621021642 in words is "seven billion, six hundred twenty-one million, twenty-one thousand, six hundred forty-two".