122615551640 has 32 divisors (see below), whose sum is σ = 276035830560. Its totient is φ = 49019404800.

The previous prime is 122615551631. The next prime is 122615551661. The reversal of 122615551640 is 46155516221.

It is a junction number, because it is equal to n+sod(n) for n = 122615551594 and 122615551603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 763841 + ... + 910320.

It is an arithmetic number, because the mean of its divisors is an integer number (8626119705).

Almost surely, 2^122615551640 is an apocalyptic number.

122615551640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122615551640 is an abundant number, since it is smaller than the sum of its proper divisors (153420278920).

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

122615551640 is a wasteful number, since it uses less digits than its factorization.

122615551640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1676003 (or 1675999 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 38.

The spelling of 122615551640 in words is "one hundred twenty-two billion, six hundred fifteen million, five hundred fifty-one thousand, six hundred forty".