97726780801 has 16 divisors (see below), whose sum is σ = 111040554240. Its totient is φ = 85263096960.

The previous prime is 97726780799. The next prime is 97726780807. The reversal of 97726780801 is 10808762779.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 97726780801 - 2¹ = 97726780799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97726780807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 352540 + ... + 565453.

It is an arithmetic number, because the mean of its divisors is an integer number (6940034640).

Almost surely, 2^97726780801 is an apocalyptic number.

It is an amenable number.

97726780801 is a deficient number, since it is larger than the sum of its proper divisors (13313773439).

97726780801 is a wasteful number, since it uses less digits than its factorization.

97726780801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918456.

The product of its (nonzero) digits is 2370816, while the sum is 55.

The spelling of 97726780801 in words is "ninety-seven billion, seven hundred twenty-six million, seven hundred eighty thousand, eight hundred one".