267132720978 has 24 divisors (see below), whose sum is σ = 578943756300. Its totient is φ = 89020210464.

The previous prime is 267132720971. The next prime is 267132720991. The reversal of 267132720978 is 879027231762.

It can be written as a sum of positive squares in 2 ways, for example, as 210463490169 + 56669230809 = 458763^2 + 238053^2 .

It is a super-2 number, since 2×267132720978² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (267132720971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1933873 + ... + 2067396.

Almost surely, 2^267132720978 is an apocalyptic number.

267132720978 is an abundant number, since it is smaller than the sum of its proper divisors (311811035322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

267132720978 is a wasteful number, since it uses less digits than its factorization.

267132720978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4004986 (or 4004983 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 54.

The spelling of 267132720978 in words is "two hundred sixty-seven billion, one hundred thirty-two million, seven hundred twenty thousand, nine hundred seventy-eight".