133997764490 has 16 divisors (see below), whose sum is σ = 241201029960. Its totient is φ = 53597982720.

The previous prime is 133997764489. The next prime is 133997764493. The reversal of 133997764490 is 94467799331.

It can be written as a sum of positive squares in 4 ways, for example, as 16967407081 + 117030357409 = 130259^2 + 342097^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (133997764493) 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, 499706 + ... + 719514.

Almost surely, 2^133997764490 is an apocalyptic number.

133997764490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133997764490 is a deficient number, since it is larger than the sum of its proper divisors (107203265470).

133997764490 is a wasteful number, since it uses less digits than its factorization.

133997764490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280777.

The product of its (nonzero) digits is 30862944, while the sum is 62.

The spelling of 133997764490 in words is "one hundred thirty-three billion, nine hundred ninety-seven million, seven hundred sixty-four thousand, four hundred ninety".