8261420387156 has 24 divisors (see below), whose sum is σ = 15219093708000. Its totient is φ = 3913127548704.

The previous prime is 8261420387153. The next prime is 8261420387173. The reversal of 8261420387156 is 6517830241628.

It is a junction number, because it is equal to n+sod(n) for n = 8261420387098 and 8261420387107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8261420387153) 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, 755666 + ... + 4134473.

It is an arithmetic number, because the mean of its divisors is an integer number (634128904500).

Almost surely, 2^{8261420387156} is an apocalyptic number.

It is an amenable number.

8261420387156 is a deficient number, since it is larger than the sum of its proper divisors (6957673320844).

8261420387156 is a wasteful number, since it uses less digits than its factorization.

8261420387156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4912391 (or 4912389 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 8261420387156 in words is "eight trillion, two hundred sixty-one billion, four hundred twenty million, three hundred eighty-seven thousand, one hundred fifty-six".