77975293090 has 16 divisors (see below), whose sum is σ = 145195373880. Its totient is φ = 30114595840.

The previous prime is 77975293079. The next prime is 77975293091. The reversal of 77975293090 is 9039257977.

It can be written as a sum of positive squares in 4 ways, for example, as 40494720289 + 37480572801 = 201233^2 + 193599^2 .

It is a Harshad number since it is a multiple of its sum of digits (58).

It is not an unprimeable number, because it can be changed into a prime (77975293091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134439871 + ... + 134440450.

Almost surely, 2^77975293090 is an apocalyptic number.

77975293090 is a deficient number, since it is larger than the sum of its proper divisors (67220080790).

77975293090 is a wasteful number, since it uses less digits than its factorization.

77975293090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268880357.

The product of its (nonzero) digits is 7501410, while the sum is 58.

The spelling of 77975293090 in words is "seventy-seven billion, nine hundred seventy-five million, two hundred ninety-three thousand, ninety".