97707279561 has 8 divisors (see below), whose sum is σ = 137939688864. Its totient is φ = 61306528320.

The previous prime is 97707279533. The next prime is 97707279611. The reversal of 97707279561 is 16597270779.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 97707279561 - 2⁵ = 97707279529 is a prime.

It is a super-2 number, since 2×97707279561² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 97707279495 and 97707279504.

It is not an unprimeable number, because it can be changed into a prime (97707272561) 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, 957914455 + ... + 957914556.

It is an arithmetic number, because the mean of its divisors is an integer number (17242461108).

Almost surely, 2^97707279561 is an apocalyptic number.

It is an amenable number.

97707279561 is a deficient number, since it is larger than the sum of its proper divisors (40232409303).

97707279561 is a wasteful number, since it uses less digits than its factorization.

97707279561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1915829031.

The product of its (nonzero) digits is 11668860, while the sum is 60.

The spelling of 97707279561 in words is "ninety-seven billion, seven hundred seven million, two hundred seventy-nine thousand, five hundred sixty-one".