155216506450 has 48 divisors (see below), whose sum is σ = 296250351264. Its totient is φ = 60468636800.

The previous prime is 155216506339. The next prime is 155216506493. The reversal of 155216506450 is 54605612551.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1138857 + ... + 1267843.

It is an arithmetic number, because the mean of its divisors is an integer number (6171882318).

Almost surely, 2^155216506450 is an apocalyptic number.

155216506450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155216506450 is a deficient number, since it is larger than the sum of its proper divisors (141033844814).

155216506450 is a wasteful number, since it uses less digits than its factorization.

155216506450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129627 (or 129622 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 40.

The spelling of 155216506450 in words is "one hundred fifty-five billion, two hundred sixteen million, five hundred six thousand, four hundred fifty".