83931757690 has 48 divisors (see below), whose sum is σ = 166179653640. Its totient is φ = 30498652800.

The previous prime is 83931757687. The next prime is 83931757697. The reversal of 83931757690 is 9675713938.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20295136521 + 63636621169 = 142461^2 + 252263^2 .

It is a super-2 number, since 2×83931757690² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (83931757697) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1704820 + ... + 1753360.

Almost surely, 2^83931757690 is an apocalyptic number.

83931757690 is a deficient number, since it is larger than the sum of its proper divisors (82247895950).

83931757690 is a wasteful number, since it uses less digits than its factorization.

83931757690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49999 (or 49988 counting only the distinct ones).

The product of its (nonzero) digits is 8573040, while the sum is 58.

The spelling of 83931757690 in words is "eighty-three billion, nine hundred thirty-one million, seven hundred fifty-seven thousand, six hundred ninety".