40657973490 has 80 divisors (see below), whose sum is σ = 111991322520. Its totient is φ = 10577675520.

The previous prime is 40657973467. The next prime is 40657973497. The reversal of 40657973490 is 9437975604.

It is a happy number.

40657973490 is a `hidden beast` number, since 4 + 0 + 65 + 7 + 97 + 3 + 490 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 27995647761 + 12662325729 = 167319^2 + 112527^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40657973497) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 578925 + ... + 645344.

Almost surely, 2^40657973490 is an apocalyptic number.

40657973490 is an abundant number, since it is smaller than the sum of its proper divisors (71333349030).

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

40657973490 is a wasteful number, since it uses less digits than its factorization.

40657973490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224329 (or 1224320 counting only the distinct ones).

The product of its (nonzero) digits is 5715360, while the sum is 54.

The spelling of 40657973490 in words is "forty billion, six hundred fifty-seven million, nine hundred seventy-three thousand, four hundred ninety".