77061479297 has 4 divisors (see below), whose sum is σ = 84067068336. Its totient is φ = 70055890260.

The previous prime is 77061479273. The next prime is 77061479333. The reversal of 77061479297 is 79297416077.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 77061479297 - 2¹⁴ = 77061462913 is a prime.

It is a super-2 number, since 2×77061479297² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77061479207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3502794503 + ... + 3502794524.

It is an arithmetic number, because the mean of its divisors is an integer number (21016767084).

Almost surely, 2^77061479297 is an apocalyptic number.

It is an amenable number.

77061479297 is a deficient number, since it is larger than the sum of its proper divisors (7005589039).

77061479297 is a wasteful number, since it uses less digits than its factorization.

77061479297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7005589038.

The product of its (nonzero) digits is 9335088, while the sum is 59.

The spelling of 77061479297 in words is "seventy-seven billion, sixty-one million, four hundred seventy-nine thousand, two hundred ninety-seven".