155671683409 has 4 divisors (see below), whose sum is σ = 169823654640. Its totient is φ = 141519712180.

The previous prime is 155671683359. The next prime is 155671683413. The reversal of 155671683409 is 904386176551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-155671683409 is a prime.

It is a super-2 number, since 2×155671683409² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155671683409.

It is not an unprimeable number, because it can be changed into a prime (155671683439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7075985599 + ... + 7075985620.

It is an arithmetic number, because the mean of its divisors is an integer number (42455913660).

Almost surely, 2^155671683409 is an apocalyptic number.

It is an amenable number.

155671683409 is a deficient number, since it is larger than the sum of its proper divisors (14151971231).

155671683409 is a wasteful number, since it uses less digits than its factorization.

155671683409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14151971230.

The product of its (nonzero) digits is 5443200, while the sum is 55.

The spelling of 155671683409 in words is "one hundred fifty-five billion, six hundred seventy-one million, six hundred eighty-three thousand, four hundred nine".