121762343640 has 64 divisors (see below), whose sum is σ = 417470895360. Its totient is φ = 27831392640.

The previous prime is 121762343629. The next prime is 121762343641. The reversal of 121762343640 is 46343267121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121762343641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72476746 + ... + 72478425.

It is an arithmetic number, because the mean of its divisors is an integer number (6522982740).

Almost surely, 2^121762343640 is an apocalyptic number.

121762343640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121762343640 is an abundant number, since it is smaller than the sum of its proper divisors (295708551720).

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

121762343640 is a wasteful number, since it uses less digits than its factorization.

121762343640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144955192 (or 144955188 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 39.

The spelling of 121762343640 in words is "one hundred twenty-one billion, seven hundred sixty-two million, three hundred forty-three thousand, six hundred forty".