67621631155 has 12 divisors (see below), whose sum is σ = 87868108800. Its totient is φ = 49935973152.

The previous prime is 67621631141. The next prime is 67621631177. The reversal of 67621631155 is 55113612676.

It is not a de Polignac number, because 67621631155 - 2¹⁹ = 67621106867 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40011955 + ... + 40013644.

It is an arithmetic number, because the mean of its divisors is an integer number (7322342400).

Almost surely, 2^67621631155 is an apocalyptic number.

67621631155 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

67621631155 is a deficient number, since it is larger than the sum of its proper divisors (20246477645).

67621631155 is a wasteful number, since it uses less digits than its factorization.

67621631155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80025630 (or 80025617 counting only the distinct ones).

The product of its digits is 226800, while the sum is 43.

The spelling of 67621631155 in words is "sixty-seven billion, six hundred twenty-one million, six hundred thirty-one thousand, one hundred fifty-five".