7621387378 has 16 divisors (see below), whose sum is σ = 12581731296. Its totient is φ = 3433608640.

The previous prime is 7621387349. The next prime is 7621387409. The reversal of 7621387378 is 8737831267.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1530376 + ... + 1535347.

It is an arithmetic number, because the mean of its divisors is an integer number (786358206).

Almost surely, 2^7621387378 is an apocalyptic number.

7621387378 is a deficient number, since it is larger than the sum of its proper divisors (4960343918).

7621387378 is a wasteful number, since it uses less digits than its factorization.

7621387378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3065849.

The product of its digits is 2370816, while the sum is 52.

The square root of 7621387378 is about 87300.5577187225. The cubic root of 7621387378 is about 1967.9376992487.

The spelling of 7621387378 in words is "seven billion, six hundred twenty-one million, three hundred eighty-seven thousand, three hundred seventy-eight".