61401854246400 has 1440 divisors, whose sum is σ = 243391031851968. Its totient is φ = 14703683174400.

The previous prime is 61401854246387. The next prime is 61401854246437. The reversal of 61401854246400 is 464245810416.

61401854246400 is a `hidden beast` number, since 6 + 1 + 4 + 0 + 185 + 4 + 2 + 464 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1440).

It is a super-2 number, since 2×61401854246400² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 20764913722 + ... + 20764916678.

Almost surely, 2^{61401854246400} is an apocalyptic number.

61401854246400 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61401854246400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121695515925984).

61401854246400 is an abundant number, since it is smaller than the sum of its proper divisors (181989177605568).

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

61401854246400 is a wasteful number, since it uses less digits than its factorization.

61401854246400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3492 (or 3468 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 45.

The spelling of 61401854246400 in words is "sixty-one trillion, four hundred one billion, eight hundred fifty-four million, two hundred forty-six thousand, four hundred".