155981516 has 6 divisors (see below), whose sum is σ = 272967660. Its totient is φ = 77990756.

The previous prime is 155981479. The next prime is 155981519. The reversal of 155981516 is 615189551.

It is not an unprimeable number, because it can be changed into a prime (155981519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19497686 + ... + 19497693.

It is an arithmetic number, because the mean of its divisors is an integer number (45494610).

Almost surely, 2^155981516 is an apocalyptic number.

It is an amenable number.

155981516 is a deficient number, since it is larger than the sum of its proper divisors (116986144).

155981516 is a wasteful number, since it uses less digits than its factorization.

155981516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38995383 (or 38995381 counting only the distinct ones).

The product of its digits is 54000, while the sum is 41.

The square root of 155981516 is about 12489.2560226781. The cubic root of 155981516 is about 538.2999989796.

The spelling of 155981516 in words is "one hundred fifty-five million, nine hundred eighty-one thousand, five hundred sixteen".