97628691626 has 4 divisors (see below), whose sum is σ = 146443037442. Its totient is φ = 48814345812.

The previous prime is 97628691593. The next prime is 97628691637. The reversal of 97628691626 is 62619682679.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62619682679 = 997 ⋅62808107.

It can be written as a sum of positive squares in only one way, i.e., 84071582401 + 13557109225 = 289951^2 + 116435^2 .

It is a super-2 number, since 2×97628691626² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24407172905 + ... + 24407172908.

Almost surely, 2^97628691626 is an apocalyptic number.

97628691626 is a deficient number, since it is larger than the sum of its proper divisors (48814345816).

97628691626 is a wasteful number, since it uses less digits than its factorization.

97628691626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48814345815.

The product of its digits is 23514624, while the sum is 62.

The spelling of 97628691626 in words is "ninety-seven billion, six hundred twenty-eight million, six hundred ninety-one thousand, six hundred twenty-six".