75047558977 has 2 divisors, whose sum is σ = 75047558978. Its totient is φ = 75047558976.

The previous prime is 75047558933. The next prime is 75047559011. The reversal of 75047558977 is 77985574057.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61591326976 + 13456232001 = 248176^2 + 116001^2 .

It is a cyclic number.

It is not a de Polignac number, because 75047558977 - 2¹⁵ = 75047526209 is a prime.

It is a super-2 number, since 2×75047558977² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (75047558917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37523779488 + 37523779489.

It is an arithmetic number, because the mean of its divisors is an integer number (37523779489).

Almost surely, 2^75047558977 is an apocalyptic number.

It is an amenable number.

75047558977 is a deficient number, since it is larger than the sum of its proper divisors (1).

75047558977 is an equidigital number, since it uses as much as digits as its factorization.

75047558977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86436000, while the sum is 64.

The spelling of 75047558977 in words is "seventy-five billion, forty-seven million, five hundred fifty-eight thousand, nine hundred seventy-seven".