7745640090 has 32 divisors (see below), whose sum is σ = 18683913600. Its totient is φ = 2055017664.

The previous prime is 7745640037. The next prime is 7745640101. The reversal of 7745640090 is 900465477.

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, 649390 + ... + 661209.

It is an arithmetic number, because the mean of its divisors is an integer number (583872300).

Almost surely, 2^7745640090 is an apocalyptic number.

7745640090 is an abundant number, since it is smaller than the sum of its proper divisors (10938273510).

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

7745640090 is a wasteful number, since it uses less digits than its factorization.

7745640090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310806.

The product of its (nonzero) digits is 211680, while the sum is 42.

The square root of 7745640090 is about 88009.3181998361. The cubic root of 7745640090 is about 1978.5746373536.

The spelling of 7745640090 in words is "seven billion, seven hundred forty-five million, six hundred forty thousand, ninety".