1377638752640 has 32 divisors (see below), whose sum is σ = 3293417644560. Its totient is φ = 551055500800.

The previous prime is 1377638752639. The next prime is 1377638752643. The reversal of 1377638752640 is 462578367731.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 1377638752640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377638752643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1076279636 + ... + 1076280915.

Almost surely, 2^{1377638752640} is an apocalyptic number.

1377638752640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1377638752640 is an abundant number, since it is smaller than the sum of its proper divisors (1915778891920).

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

1377638752640 is an equidigital number, since it uses as much as digits as its factorization.

1377638752640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2152560570 (or 2152560558 counting only the distinct ones).

The product of its (nonzero) digits is 35562240, while the sum is 59.

The spelling of 1377638752640 in words is "one trillion, three hundred seventy-seven billion, six hundred thirty-eight million, seven hundred fifty-two thousand, six hundred forty".