37661140520638 has 8 divisors (see below), whose sum is σ = 56659341971232. Its totient is φ = 18774693196896.

The previous prime is 37661140520599. The next prime is 37661140520639. The reversal of 37661140520638 is 83602504116673.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37661140520639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27938530870 + ... + 27938532217.

It is an arithmetic number, because the mean of its divisors is an integer number (7082417746404).

Almost surely, 2^{37661140520638} is an apocalyptic number.

37661140520638 is a deficient number, since it is larger than the sum of its proper divisors (18998201450594).

37661140520638 is a wasteful number, since it uses less digits than its factorization.

37661140520638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55877063426.

The product of its (nonzero) digits is 4354560, while the sum is 52.

The spelling of 37661140520638 in words is "thirty-seven trillion, six hundred sixty-one billion, one hundred forty million, five hundred twenty thousand, six hundred thirty-eight".