61455370215100 has 72 divisors (see below), whose sum is σ = 134032619519568. Its totient is φ = 24458129932800.

The previous prime is 61455370215079. The next prime is 61455370215121. The reversal of 61455370215100 is 151207355416.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (61455370215079) and next prime (61455370215121).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14075824 + ... + 17917576.

It is an arithmetic number, because the mean of its divisors is an integer number (1861564159994).

Almost surely, 2^{61455370215100} is an apocalyptic number.

It is an amenable number.

61455370215100 is an abundant number, since it is smaller than the sum of its proper divisors (72577249304468).

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

61455370215100 is a wasteful number, since it uses less digits than its factorization.

61455370215100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3842575 (or 3842568 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 40.

The spelling of 61455370215100 in words is "sixty-one trillion, four hundred fifty-five billion, three hundred seventy million, two hundred fifteen thousand, one hundred".