155665615061 has 8 divisors (see below), whose sum is σ = 173430163584. Its totient is φ = 138503254720.

The previous prime is 155665615057. The next prime is 155665615087. The reversal of 155665615061 is 160516566551.

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

It is not a de Polignac number, because 155665615061 - 2² = 155665615057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155665614997 and 155665615015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155665615661) 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, 150546500 + ... + 150547533.

It is an arithmetic number, because the mean of its divisors is an integer number (21678770448).

Almost surely, 2^155665615061 is an apocalyptic number.

155665615061 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

155665615061 is a deficient number, since it is larger than the sum of its proper divisors (17764548523).

155665615061 is a wasteful number, since it uses less digits than its factorization.

155665615061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301094091.

The product of its (nonzero) digits is 810000, while the sum is 47.

The spelling of 155665615061 in words is "one hundred fifty-five billion, six hundred sixty-five million, six hundred fifteen thousand, sixty-one".