155459079640 has 16 divisors (see below), whose sum is σ = 349782929280. Its totient is φ = 62183631840.

The previous prime is 155459079617. The next prime is 155459079647. The reversal of 155459079640 is 46970954551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155459079647) 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, 1943238456 + ... + 1943238535.

It is an arithmetic number, because the mean of its divisors is an integer number (21861433080).

Almost surely, 2^155459079640 is an apocalyptic number.

155459079640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155459079640 is an abundant number, since it is smaller than the sum of its proper divisors (194323849640).

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

155459079640 is a wasteful number, since it uses less digits than its factorization.

155459079640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3886477002 (or 3886476998 counting only the distinct ones).

The product of its (nonzero) digits is 6804000, while the sum is 55.

The spelling of 155459079640 in words is "one hundred fifty-five billion, four hundred fifty-nine million, seventy-nine thousand, six hundred forty".