139861626961 has 8 divisors (see below), whose sum is σ = 159854224320. Its totient is φ = 119872120848.

The previous prime is 139861626937. The next prime is 139861626991. The reversal of 139861626961 is 169626168931.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 139861626961 - 2⁵ = 139861626929 is a prime.

It is a super-2 number, since 2×139861626961² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 139861626896 and 139861626905.

It is not an unprimeable number, because it can be changed into a prime (139861626991) 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, 675031 + ... + 857548.

It is an arithmetic number, because the mean of its divisors is an integer number (19981778040).

Almost surely, 2^139861626961 is an apocalyptic number.

It is an amenable number.

139861626961 is a deficient number, since it is larger than the sum of its proper divisors (19992597359).

139861626961 is a wasteful number, since it uses less digits than its factorization.

139861626961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545623.

The product of its digits is 5038848, while the sum is 58.

The spelling of 139861626961 in words is "one hundred thirty-nine billion, eight hundred sixty-one million, six hundred twenty-six thousand, nine hundred sixty-one".